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1. vnpy/chart/item.py

from abc import abstractmethod
from typing import List, Dict, Tuple

import numpy as np
import pyqtgraph as pg
import talib

from vnpy.trader.ui import QtCore, QtGui, QtWidgets
from vnpy.trader.object import BarData

from .base import BLACK_COLOR, UP_COLOR, DOWN_COLOR, PEN_WIDTH, BAR_WIDTH
from .manager import BarManager


class ChartItem(pg.GraphicsObject):
    """"""

    def __init__(self, manager: BarManager):
        """"""
        super().__init__()

        self._manager: BarManager = manager

        self._bar_picutures: Dict[int, QtGui.QPicture] = {}
        self._item_picuture: QtGui.QPicture = None

        self._black_brush: QtGui.QBrush = pg.mkBrush(color=UP_COLOR)

        self._up_pen: QtGui.QPen = pg.mkPen(
            color=UP_COLOR, width=PEN_WIDTH
        )
        self._up_brush: QtGui.QBrush = pg.mkBrush(color=UP_COLOR)

        self._down_pen: QtGui.QPen = pg.mkPen(
            color=DOWN_COLOR, width=PEN_WIDTH
        )
        self._down_brush: QtGui.QBrush = pg.mkBrush(color=DOWN_COLOR)

        self._rect_area: Tuple[float, float] = None

        # Very important! Only redraw the visible part and improve speed a lot.
        self.setFlag(self.ItemUsesExtendedStyleOption)

    @abstractmethod
    def _draw_bar_picture(self, ix: int, bar: BarData) -> QtGui.QPicture:
        """
        Draw picture for specific bar.
        """
        pass

    @abstractmethod
    def boundingRect(self) -> QtCore.QRectF:
        """
        Get bounding rectangles for item.
        """
        pass

    @abstractmethod
    def get_y_range(self, min_ix: int = None, max_ix: int = None) -> Tuple[float, float]:
        """
        Get range of y-axis with given x-axis range.
        If min_ix and max_ix not specified, then return range with whole data set.
        """
        pass

    @abstractmethod
    def get_info_text(self, ix: int) -> str:
        """
        Get information text to show by cursor.
        """
        pass

    def update_history(self, history: List[BarData]) -> BarData:
        """
        Update a list of bar data.
        """
        self._bar_picutures.clear()

        bars = self._manager.get_all_bars()
        for ix, bar in enumerate(bars):
            self._bar_picutures[ix] = None

        self.update()

    def update_bar(self, bar: BarData) -> BarData:
        """
        Update single bar data.
        """
        ix = self._manager.get_index(bar.datetime)

        self._bar_picutures[ix] = None

        self.update()

    def update(self) -> None:
        """
        Refresh the item.
        """
        if self.scene():
            self.scene().update()

    def paint(
            self,
            painter: QtGui.QPainter,
            opt: QtWidgets.QStyleOptionGraphicsItem,
            w: QtWidgets.QWidget
    ):
        """
        Reimplement the paint method of parent class.
        This function is called by external QGraphicsView.
        """
        rect = opt.exposedRect

        min_ix = int(rect.left())
        max_ix = int(rect.right())
        max_ix = min(max_ix, len(self._bar_picutures))

        rect_area = (min_ix, max_ix)
        if rect_area != self._rect_area or not self._item_picuture:
            self._rect_area = rect_area
            self._draw_item_picture(min_ix, max_ix)

        self._item_picuture.play(painter)

    def _draw_item_picture(self, min_ix: int, max_ix: int) -> None:
        """
        Draw the picture of item in specific range.
        """
        self._item_picuture = QtGui.QPicture()
        painter = QtGui.QPainter(self._item_picuture)

        for ix in range(min_ix, max_ix):
            bar_picture = self._bar_picutures[ix]

            if bar_picture is None:
                bar = self._manager.get_bar(ix)
                bar_picture = self._draw_bar_picture(ix, bar)
                self._bar_picutures[ix] = bar_picture

            bar_picture.play(painter)

        painter.end()

    def clear_all(self) -> None:
        """
        Clear all data in the item.
        """
        self._item_picuture = None
        self._bar_picutures.clear()
        self.update()


class CandleItem(ChartItem):
    """"""

    def __init__(self, manager: BarManager):
        """"""
        super().__init__(manager)

    def _draw_bar_picture(self, ix: int, bar: BarData) -> QtGui.QPicture:
        """"""
        # Create objects
        candle_picture = QtGui.QPicture()
        painter = QtGui.QPainter(candle_picture)

        # Set painter color
        if bar.close_price >= bar.open_price:
            painter.setPen(self._up_pen)
            painter.setBrush(self._black_brush)
        else:
            painter.setPen(self._down_pen)
            painter.setBrush(self._down_brush)

        # Draw candle shadow
        if bar.high_price > bar.low_price:
            painter.drawLine(
                QtCore.QPointF(ix, bar.high_price),
                QtCore.QPointF(ix, bar.low_price)
            )

        # Draw candle body
        if bar.open_price == bar.close_price:
            painter.drawLine(
                QtCore.QPointF(ix - BAR_WIDTH, bar.open_price),
                QtCore.QPointF(ix + BAR_WIDTH, bar.open_price),
            )
        else:
            rect = QtCore.QRectF(
                ix - BAR_WIDTH,
                bar.open_price,
                BAR_WIDTH * 2,
                bar.close_price - bar.open_price
            )
            painter.drawRect(rect)

        # Finish
        painter.end()
        return candle_picture

    def boundingRect(self) -> QtCore.QRectF:
        """"""
        min_price, max_price = self._manager.get_price_range()
        rect = QtCore.QRectF(
            0,
            min_price,
            len(self._bar_picutures),
            max_price - min_price
        )
        return rect

    def get_y_range(self, min_ix: int = None, max_ix: int = None) -> Tuple[float, float]:
        """
        Get range of y-axis with given x-axis range.
        If min_ix and max_ix not specified, then return range with whole data set.
        """
        min_price, max_price = self._manager.get_price_range(min_ix, max_ix)
        return min_price, max_price

    def get_info_text(self, ix: int) -> str:
        """
        Get information text to show by cursor.
        """
        bar = self._manager.get_bar(ix)

        if bar:
            words = [
                "Date",
                bar.datetime.strftime("%Y-%m-%d"),
                "",
                "Time",
                bar.datetime.strftime("%H:%M"),
                "",
                "Open",
                str(bar.open_price),
                "",
                "High",
                str(bar.high_price),
                "",
                "Low",
                str(bar.low_price),
                "",
                "Close",
                str(bar.close_price)
            ]
            text = "  ".join(words)
        else:
            text = ""
        return text


class VolumeItem(ChartItem):
    """"""

    def __init__(self, manager: BarManager):
        """"""
        super().__init__(manager)

    def _draw_bar_picture(self, ix: int, bar: BarData) -> QtGui.QPicture:
        """"""
        # Create objects
        volume_picture = QtGui.QPicture()
        painter = QtGui.QPainter(volume_picture)

        # Set painter color
        if bar.close_price >= bar.open_price:
            painter.setPen(self._up_pen)
            painter.setBrush(self._up_brush)
        else:
            painter.setPen(self._down_pen)
            painter.setBrush(self._down_brush)

        # Draw volume body
        rect = QtCore.QRectF(
            ix - BAR_WIDTH,
            0,
            BAR_WIDTH * 2,
            bar.volume
        )
        painter.drawRect(rect)

        # Finish
        painter.end()
        return volume_picture

    def boundingRect(self) -> QtCore.QRectF:
        """"""
        min_volume, max_volume = self._manager.get_volume_range()
        rect = QtCore.QRectF(
            0,
            min_volume,
            len(self._bar_picutures),
            max_volume - min_volume
        )
        return rect

    def get_y_range(self, min_ix: int = None, max_ix: int = None) -> Tuple[float, float]:
        """
        Get range of y-axis with given x-axis range.
        If min_ix and max_ix not specified, then return range with whole data set.
        """
        min_volume, max_volume = self._manager.get_volume_range(min_ix, max_ix)
        return min_volume, max_volume

    def get_info_text(self, ix: int) -> str:
        """
        Get information text to show by cursor.
        """
        bar = self._manager.get_bar(ix)

        if bar:
            text = f"Volume {bar.volume}"
        else:
            text = ""

        return text


class LineItem(CandleItem):
    """"""

    def __init__(self, manager: BarManager):
        """"""
        super().__init__(manager)

        self.yellow_pen: QtGui.QPen = pg.mkPen(color=(255, 255, 0), width=1, style=QtCore.Qt.DashDotLine)

    def get_info_text(self, ix: int) -> str:
        return ""

    def _draw_bar_picture(self, ix: int, bar: BarData) -> QtGui.QPicture:
        """"""
        last_bar = self._manager.get_bar(ix - 1)

        # Create objects
        picture = QtGui.QPicture()
        painter = QtGui.QPainter(picture)

        # Set painter color
        painter.setPen(self.yellow_pen)

        # Draw Line
        end_point = QtCore.QPointF(ix, bar.close_price)

        if last_bar:
            start_point = QtCore.QPointF(ix - 1, last_bar.close_price)
        else:
            start_point = end_point

        painter.drawLine(start_point, end_point)

        # Finish
        painter.end()
        return picture


class SmaItem(CandleItem):
    """"""

    def __init__(self, manager: BarManager):
        """"""
        super().__init__(manager)

        self.blue_pen: QtGui.QPen = pg.mkPen(color=(100, 100, 255), width=2)

        self.sma_window = 10
        self.sma_data: Dict[int, float] = {}

    def get_sma_value(self, ix: int) -> float:
        """"""
        if ix < 0:
            return 0

        # When initialize, calculate all sma value
        if not self.sma_data:
            bars = self._manager.get_all_bars()
            close_data = [bar.close_price for bar in bars]
            sma_array = talib.SMA(np.array(close_data), self.sma_window)

            for n, value in enumerate(sma_array):
                self.sma_data[n] = value

        # Return if already calcualted
        if ix in self.sma_data:
            return self.sma_data[ix]

        # Else calculate new value
        close_data = []
        for n in range(ix - self.sma_window, ix + 1):
            bar = self._manager.get_bar(n)
            close_data.append(bar.close_price)

        sma_array = talib.SMA(np.array(close_data), self.sma_window)
        sma_value = sma_array[-1]
        self.sma_data[ix] = sma_value

        return sma_value

    def _draw_bar_picture(self, ix: int, bar: BarData) -> QtGui.QPicture:
        """"""
        sma_value = self.get_sma_value(ix)
        last_sma_value = self.get_sma_value(ix - 1)

        # Create objects
        picture = QtGui.QPicture()
        painter = QtGui.QPainter(picture)

        # Set painter color
        painter.setPen(self.blue_pen)

        # Draw Line
        start_point = QtCore.QPointF(ix - 1, last_sma_value)
        end_point = QtCore.QPointF(ix, sma_value)
        painter.drawLine(start_point, end_point)

        # Finish
        painter.end()
        return picture

    def get_info_text(self, ix: int) -> str:
        """"""
        if ix in self.sma_data:
            sma_value = self.sma_data[ix]
            text = "SMA {:.8f}".format(sma_value)
        else:
            text = "SMA -"

        return text


class RsiItem(ChartItem):
    """"""

    def __init__(self, manager: BarManager):
        """"""
        super().__init__(manager)

        self.white_pen: QtGui.QPen = pg.mkPen(color=(255, 255, 255), width=1)
        self.yellow_pen: QtGui.QPen = pg.mkPen(color=(255, 255, 0), width=2)

        self.rsi_window = 14
        self.rsi_data: Dict[int, float] = {}

    def get_rsi_value(self, ix: int) -> float:
        """"""
        if ix < 0:
            return 50

        # When initialize, calculate all rsi value
        if not self.rsi_data:
            bars = self._manager.get_all_bars()
            close_data = [bar.close_price for bar in bars]
            rsi_array = talib.RSI(np.array(close_data), self.rsi_window)

            for n, value in enumerate(rsi_array):
                self.rsi_data[n] = value

        # Return if already calcualted
        if ix in self.rsi_data:
            return self.rsi_data[ix]

        # Else calculate new value
        close_data = []
        for n in range(ix - self.rsi_window, ix + 1):
            bar = self._manager.get_bar(n)
            close_data.append(bar.close_price)

        rsi_array = talib.RSI(np.array(close_data), self.rsi_window)
        rsi_value = rsi_array[-1]
        self.rsi_data[ix] = rsi_value

        return rsi_value

    def _draw_bar_picture(self, ix: int, bar: BarData) -> QtGui.QPicture:
        """"""
        rsi_value = self.get_rsi_value(ix)
        last_rsi_value = self.get_rsi_value(ix - 1)

        # Create objects
        picture = QtGui.QPicture()
        painter = QtGui.QPainter(picture)

        # Draw RSI line
        painter.setPen(self.yellow_pen)

        if np.isnan(last_rsi_value) or np.isnan(rsi_value):
            # print(ix - 1, last_rsi_value,ix, rsi_value,)
            pass
        else:
            end_point = QtCore.QPointF(ix, rsi_value)
            start_point = QtCore.QPointF(ix - 1, last_rsi_value)
            painter.drawLine(start_point, end_point)

        # Draw oversold/overbought line
        painter.setPen(self.white_pen)

        painter.drawLine(
            QtCore.QPointF(ix, 70),
            QtCore.QPointF(ix - 1, 70),
        )

        painter.drawLine(
            QtCore.QPointF(ix, 30),
            QtCore.QPointF(ix - 1, 30),
        )

        # Finish
        painter.end()
        return picture

    def boundingRect(self) -> QtCore.QRectF:
        """"""
        # min_price, max_price = self._manager.get_price_range()
        rect = QtCore.QRectF(
            0,
            0,
            len(self._bar_picutures),
            100
        )
        return rect

    def get_y_range(self, min_ix: int = None, max_ix: int = None) -> Tuple[float, float]:
        """  """
        return 0, 100

    def get_info_text(self, ix: int) -> str:
        """"""
        if ix in self.rsi_data:
            rsi_value = self.rsi_data[ix]
            text = "RSI {:.8f}".format(rsi_value)
            # print(text)
        else:
            text = "RSI -"

        return text


def to_int(value: float) -> int:
    """"""
    return int(round(value, 0))


# 将y方向的显示范围扩大到1.1
def adjust_range(in_range: Tuple[float, float]) -> Tuple[float, float]:
    ret_range: Tuple[float, float]
    diff = abs(in_range[0] - in_range[1])
    ret_range = (in_range[0] - diff * 0.05, in_range[1] + diff * 0.05)
    return ret_range


class MacdItem(ChartItem):
    """"""
    _values_ranges: Dict[Tuple[int, int], Tuple[float, float]] = {}

    last_range: Tuple[int, int] = (-1, -1)  # 最新显示K线索引范围

    def __init__(self, manager: BarManager):
        """"""
        super().__init__(manager)

        self.white_pen: QtGui.QPen = pg.mkPen(color=(255, 255, 255), width=1)
        self.yellow_pen: QtGui.QPen = pg.mkPen(color=(255, 255, 0), width=1)
        self.red_pen: QtGui.QPen = pg.mkPen(color=(237, 97, 96), width=1)
        self.green_pen: QtGui.QPen = pg.mkPen(color=(0, 192, 135), width=1)

        self.short_window = 12
        self.long_window = 26
        self.M = 9

        self.macd_data: Dict[int, Tuple[float, float, float]] = {}

    def get_macd_value(self, ix: int) -> Tuple[float, float, float]:
        """"""
        if ix < 0:
            return 0.0, 0.0, 0.0

        # When initialize, calculate all macd value
        if not self.macd_data:
            bars = self._manager.get_all_bars()
            close_data = [bar.close_price for bar in bars]

            diffs, deas, macds = talib.MACD(np.array(close_data),
                                            fastperiod=self.short_window,
                                            slowperiod=self.long_window,
                                            signalperiod=self.M)

            for n in range(0, len(diffs)):
                self.macd_data[n] = (diffs[n], deas[n], macds[n])

        # Return if already calcualted
        if ix in self.macd_data:
            return self.macd_data[ix]

        # Else calculate new value
        close_data = []
        for n in range(ix - self.long_window - self.M + 1, ix + 1):
            bar = self._manager.get_bar(n)
            close_data.append(bar.close_price)

        diffs, deas, macds = talib.MACD(np.array(close_data),
                                        fastperiod=self.short_window,
                                        slowperiod=self.long_window,
                                        signalperiod=self.M)
        diff, dea, macd = diffs[-1], deas[-1], macds[-1]
        self.macd_data[ix] = (diff, dea, macd)

        return diff, dea, macd

    def _draw_bar_picture(self, ix: int, bar: BarData) -> QtGui.QPicture:
        """"""
        macd_value = self.get_macd_value(ix)
        last_macd_value = self.get_macd_value(ix - 1)

        # # Create objects
        picture = QtGui.QPicture()
        painter = QtGui.QPainter(picture)

        # # Draw macd lines
        if np.isnan(macd_value[0]) or np.isnan(last_macd_value[0]):
            # print("略过macd lines0")
            pass
        else:
            end_point0 = QtCore.QPointF(ix, macd_value[0])
            start_point0 = QtCore.QPointF(ix - 1, last_macd_value[0])
            painter.setPen(self.white_pen)
            painter.drawLine(start_point0, end_point0)

        if np.isnan(macd_value[1]) or np.isnan(last_macd_value[1]):
            # print("略过macd lines1")
            pass
        else:
            end_point1 = QtCore.QPointF(ix, macd_value[1])
            start_point1 = QtCore.QPointF(ix - 1, last_macd_value[1])
            painter.setPen(self.yellow_pen)
            painter.drawLine(start_point1, end_point1)

        if not np.isnan(macd_value[2]):
            if (macd_value[2] > 0):
                painter.setPen(self.green_pen)
                painter.setBrush(pg.mkBrush(0, 192, 135))
            else:
                painter.setPen(self.red_pen)
                painter.setBrush(pg.mkBrush(237, 97, 96))
            painter.drawRect(QtCore.QRectF(ix - 0.3, 0, 0.6, macd_value[2]))
        else:
            # print("略过macd lines2")
            pass

        painter.end()
        return picture

    def boundingRect(self) -> QtCore.QRectF:
        """"""
        min_y, max_y = self.get_y_range()
        rect = QtCore.QRectF(
            0,
            min_y,
            len(self._bar_picutures),
            max_y
        )
        return rect

    def get_y_range(self, min_ix: int = None, max_ix: int = None) -> Tuple[float, float]:
        #   获得3个指标在y轴方向的范围
        #   hxxjava 修改,2020-6-29
        #   当显示范围改变时,min_ix,max_ix的值不为None,当显示范围不变时,min_ix,max_ix的值不为None,

        offset = max(self.short_window, self.long_window) + self.M - 1

        if not self.macd_data or len(self.macd_data) < offset:
            return 0.0, 1.0

        # print("len of range dict:",len(self._values_ranges),",macd_data:",len(self.macd_data),(min_ix,max_ix))

        if min_ix != None:  # 调整最小K线索引
            min_ix = max(min_ix, offset)

        if max_ix != None:  # 调整最大K线索引
            max_ix = min(max_ix, len(self.macd_data) - 1)

        last_range = (min_ix, max_ix)  # 请求的最新范围

        if last_range == (None, None):  # 当显示范围不变时
            if self.last_range in self._values_ranges:
                # 如果y方向范围已经保存
                # 读取y方向范围
                result = self._values_ranges[self.last_range]
                # print("1:",self.last_range,result)
                return adjust_range(result)
            else:
                # 如果y方向范围没有保存
                # 从macd_data重新计算y方向范围
                min_ix, max_ix = 0, len(self.macd_data) - 1

                macd_list = list(self.macd_data.values())[min_ix:max_ix + 1]
                ndarray = np.array(macd_list)
                max_price = np.nanmax(ndarray)
                min_price = np.nanmin(ndarray)

                # 保存y方向范围,同时返回结果
                result = (min_price, max_price)
                self.last_range = (min_ix, max_ix)
                self._values_ranges[self.last_range] = result
                # print("2:",self.last_range,result)
                return adjust_range(result)

        """ 以下为显示范围变化时 """

        if last_range in self._values_ranges:
            # 该范围已经保存过y方向范围
            # 取得y方向范围,返回结果
            result = self._values_ranges[last_range]
            # print("3:",last_range,result)
            return adjust_range(result)

        # 该范围没有保存过y方向范围
        # 从macd_data重新计算y方向范围
        macd_list = list(self.macd_data.values())[min_ix:max_ix + 1]
        ndarray = np.array(macd_list)
        max_price = np.nanmax(ndarray)
        min_price = np.nanmin(ndarray)

        # 取得y方向范围,返回结果
        result = (min_price, max_price)
        self.last_range = last_range
        self._values_ranges[self.last_range] = result
        # print("4:",self.last_range,result)
        return adjust_range(result)

    def get_info_text(self, ix: int) -> str:
        # """"""
        if ix in self.macd_data:
            diff, dea, macd = self.macd_data[ix]
            words = [
                "diff {:.8f}".format(diff), " ",
                "dea {:.8f}".format(diff), " ",
                "macd {:.8f}".format(diff)
            ]
            text = "  ".join(words)
        else:
            text = "diff - \ndea - \nmacd -"

        return text

2. vnpy/chart/base.py

from vnpy.trader.ui import QtGui


WHITE_COLOR = (255, 255, 255)
BLACK_COLOR = (0, 0, 0)
GREY_COLOR = (100, 100, 100)

UP_COLOR = (0, 192, 135)
DOWN_COLOR = (237, 97, 96)
CURSOR_COLOR = (100, 110, 120)

PEN_WIDTH = 1
BAR_WIDTH = 0.3

AXIS_WIDTH = 0.8
NORMAL_FONT = QtGui.QFont("Arial", 9)


def to_int(value: float) -> int:
    """"""
    return int(round(value, 0))

3. vnpy/chart/widget.py

from typing import List, Dict, Type

import pyqtgraph as pg

from vnpy.trader.ui import QtGui, QtWidgets, QtCore
from vnpy.trader.object import BarData

from vnpy.event import Event, EventEngine

from .manager import BarManager
from .base import (
    GREY_COLOR, WHITE_COLOR, CURSOR_COLOR, BLACK_COLOR,
    to_int, NORMAL_FONT
)
from .axis import DatetimeAxis
from .item import ChartItem

from vnpy.app.cta_strategy.base import (
    EVENT_CTA_TICK,
    EVENT_CTA_BAR,
    EVENT_CTA_ORDER,
    EVENT_CTA_TRADE,
    EVENT_CTA_HISTORY_BAR
)

pg.setConfigOptions(antialias=True)


class ChartWidget(pg.PlotWidget):
    """"""
    MIN_BAR_COUNT = 100

    def __init__(self, parent: QtWidgets.QWidget = None):
        """"""
        super().__init__(parent)

        self._manager: BarManager = BarManager()

        self._plots: Dict[str, pg.PlotItem] = {}
        self._items: Dict[str, ChartItem] = {}
        self._item_plot_map: Dict[ChartItem, pg.PlotItem] = {}

        self._first_plot: pg.PlotItem = None
        self._cursor: ChartCursor = None

        self._right_ix: int = 0  # Index of most right data
        self._bar_count: int = self.MIN_BAR_COUNT  # Total bar visible in chart

        self._init_ui()

    def _init_ui(self) -> None:
        """"""
        self.setWindowTitle("ChartWidget of vn.py")

        self._layout = pg.GraphicsLayout()
        self._layout.setContentsMargins(10, 10, 10, 10)
        self._layout.setSpacing(0)
        self._layout.setBorder(color=GREY_COLOR, width=0.8)
        self._layout.setZValue(0)
        self.setCentralItem(self._layout)

    def _get_new_x_axis(self):
        return DatetimeAxis(self._manager, orientation='bottom')

    def add_cursor(self) -> None:
        """"""
        if not self._cursor:
            self._cursor = ChartCursor(
                self, self._manager, self._plots, self._item_plot_map)

    def add_plot(
            self,
            plot_name: str,
            minimum_height: int = 80,
            maximum_height: int = None,
            hide_x_axis: bool = False
    ) -> None:
        """
        Add plot area.
        """
        # Create plot object
        plot = pg.PlotItem(axisItems={'bottom': self._get_new_x_axis()})
        plot.setMenuEnabled(False)
        plot.setClipToView(True)
        plot.hideAxis('left')
        plot.showAxis('right')
        plot.setDownsampling(mode='peak')
        plot.setRange(xRange=(0, 1), yRange=(0, 1))
        plot.hideButtons()
        plot.setMinimumHeight(minimum_height)

        if maximum_height:
            plot.setMaximumHeight(maximum_height)

        if hide_x_axis:
            plot.hideAxis("bottom")

        if not self._first_plot:
            self._first_plot = plot

        # Connect view change signal to update y range function
        view = plot.getViewBox()
        view.sigXRangeChanged.connect(self._update_y_range)
        view.setMouseEnabled(x=True, y=False)

        # Set right axis
        right_axis = plot.getAxis('right')
        right_axis.setWidth(60)
        right_axis.tickFont = NORMAL_FONT

        # Connect x-axis link
        if self._plots:
            first_plot = list(self._plots.values())[0]
            plot.setXLink(first_plot)

        # Store plot object in dict
        self._plots[plot_name] = plot

        # Add plot onto the layout
        self._layout.nextRow()
        self._layout.addItem(plot)

    def add_item(
            self,
            item_class: Type[ChartItem],
            item_name: str,
            plot_name: str
    ):
        """
        Add chart item.
        """
        item = item_class(self._manager)
        self._items[item_name] = item

        plot = self._plots.get(plot_name)
        plot.addItem(item)

        self._item_plot_map[item] = plot

    def get_plot(self, plot_name: str) -> pg.PlotItem:
        """
        Get specific plot with its name.
        """
        return self._plots.get(plot_name, None)

    def get_all_plots(self) -> List[pg.PlotItem]:
        """
        Get all plot objects.
        """
        return self._plots.values()

    def clear_all(self) -> None:
        """
        Clear all data.
        """
        self._manager.clear_all()

        for item in self._items.values():
            item.clear_all()

        if self._cursor:
            self._cursor.clear_all()

    def update_history(self, history: List[BarData]) -> None:
        """
        Update a list of bar data.
        """
        self._manager.update_history(history)

        for item in self._items.values():
            item.update_history(history)

        self._update_plot_limits()

        self.move_to_right()

    def update_bar(self, bar: BarData) -> None:
        """
        Update single bar data.
        """
        self._manager.update_bar(bar)

        for item in self._items.values():
            item.update_bar(bar)

        self._update_plot_limits()

        if self._right_ix >= (self._manager.get_count() - self._bar_count / 2):
            self.move_to_right()

    def _update_plot_limits(self) -> None:
        """
        Update the limit of plots.
        """
        for item, plot in self._item_plot_map.items():
            min_value, max_value = item.get_y_range()

            plot.setLimits(
                xMin=-1,
                xMax=self._manager.get_count(),
                yMin=min_value,
                yMax=max_value
            )

    def _update_x_range(self) -> None:
        """
        Update the x-axis range of plots.
        """
        max_ix = self._right_ix
        min_ix = self._right_ix - self._bar_count

        for plot in self._plots.values():
            plot.setRange(xRange=(min_ix, max_ix), padding=0)

    def _update_y_range(self) -> None:
        """
        Update the y-axis range of plots.
        """
        view = self._first_plot.getViewBox()
        view_range = view.viewRange()

        min_ix = max(0, int(view_range[0][0]))
        max_ix = min(self._manager.get_count(), int(view_range[0][1]))

        # Update limit for y-axis
        for item, plot in self._item_plot_map.items():
            y_range = item.get_y_range(min_ix, max_ix)
            plot.setRange(yRange=y_range)

    def paintEvent(self, event: QtGui.QPaintEvent) -> None:
        """
        Reimplement this method of parent to update current max_ix value.
        """
        view = self._first_plot.getViewBox()
        view_range = view.viewRange()
        self._right_ix = max(0, view_range[0][1])

        super().paintEvent(event)

    def keyPressEvent(self, event: QtGui.QKeyEvent) -> None:
        """
        Reimplement this method of parent to move chart horizontally and zoom in/out.
        """
        if event.key() == QtCore.Qt.Key_Left:
            self._on_key_left()
        elif event.key() == QtCore.Qt.Key_Right:
            self._on_key_right()
        elif event.key() == QtCore.Qt.Key_Up:
            self._on_key_up()
        elif event.key() == QtCore.Qt.Key_Down:
            self._on_key_down()

    def wheelEvent(self, event: QtGui.QWheelEvent) -> None:
        """
        Reimplement this method of parent to zoom in/out.
        """
        delta = event.angleDelta()

        if delta.y() > 0:
            self._on_key_up()
        elif delta.y() < 0:
            self._on_key_down()

    def _on_key_left(self) -> None:
        """
        Move chart to left.
        """
        self._right_ix -= 1
        self._right_ix = max(self._right_ix, self._bar_count)

        self._update_x_range()
        self._cursor.move_left()
        self._cursor.update_info()

    def _on_key_right(self) -> None:
        """
        Move chart to right.
        """
        self._right_ix += 1
        self._right_ix = min(self._right_ix, self._manager.get_count())

        self._update_x_range()
        self._cursor.move_right()
        self._cursor.update_info()

    def _on_key_down(self) -> None:
        """
        Zoom out the chart.
        """
        self._bar_count *= 1.2
        self._bar_count = min(int(self._bar_count), self._manager.get_count())

        self._update_x_range()
        self._cursor.update_info()

    def _on_key_up(self) -> None:
        """
        Zoom in the chart.
        """
        self._bar_count /= 1.2
        self._bar_count = max(int(self._bar_count), self.MIN_BAR_COUNT)

        self._update_x_range()
        self._cursor.update_info()

    def move_to_right(self) -> None:
        """
        Move chart to the most right.
        """
        self._right_ix = self._manager.get_count()
        self._update_x_range()
        self._cursor.update_info()


class ChartCursor(QtCore.QObject):
    """"""

    def __init__(
            self,
            widget: ChartWidget,
            manager: BarManager,
            plots: Dict[str, pg.GraphicsObject],
            item_plot_map: Dict[ChartItem, pg.GraphicsObject]
    ):
        """"""
        super().__init__()

        self._widget: ChartWidget = widget
        self._manager: BarManager = manager
        self._plots: Dict[str, pg.GraphicsObject] = plots
        self._item_plot_map: Dict[ChartItem, pg.GraphicsObject] = item_plot_map

        self._x: int = 0
        self._y: int = 0
        self._plot_name: str = ""

        self._init_ui()
        self._connect_signal()

    def _init_ui(self):
        """"""
        self._init_line()
        self._init_label()
        self._init_info()

    def _init_line(self) -> None:
        """
        Create line objects.
        """
        self._v_lines: Dict[str, pg.InfiniteLine] = {}
        self._h_lines: Dict[str, pg.InfiniteLine] = {}
        self._views: Dict[str, pg.ViewBox] = {}

        pen = pg.mkPen(CURSOR_COLOR, style=QtCore.Qt.DashDotLine)

        for plot_name, plot in self._plots.items():
            v_line = pg.InfiniteLine(angle=90, movable=False, pen=pen)
            h_line = pg.InfiniteLine(angle=0, movable=False, pen=pen)
            view = plot.getViewBox()

            for line in [v_line, h_line]:
                line.setZValue(0)
                line.hide()
                view.addItem(line)

            self._v_lines[plot_name] = v_line
            self._h_lines[plot_name] = h_line
            self._views[plot_name] = view

    def _init_label(self) -> None:
        """
        Create label objects on axis.
        """
        self._y_labels: Dict[str, pg.TextItem] = {}
        for plot_name, plot in self._plots.items():
            label = pg.TextItem(
                plot_name, fill=GREY_COLOR, color=WHITE_COLOR)
            label.hide()
            label.setZValue(2)
            label.setFont(NORMAL_FONT)
            plot.addItem(label, ignoreBounds=True)
            self._y_labels[plot_name] = label

        self._x_label: pg.TextItem = pg.TextItem(
            "datetime", fill=GREY_COLOR, color=WHITE_COLOR)
        self._x_label.hide()
        self._x_label.setZValue(2)
        self._x_label.setFont(NORMAL_FONT)
        plot.addItem(self._x_label, ignoreBounds=True)

    def _init_info(self) -> None:
        """
        """
        self._infos: Dict[str, pg.TextItem] = {}
        for plot_name, plot in self._plots.items():
            info = pg.TextItem(
                "info",
                color=CURSOR_COLOR
            )
            info.hide()
            info.setZValue(2)
            info.setFont(NORMAL_FONT)
            plot.addItem(info, ignoreBounds=True)
            self._infos[plot_name] = info

    def _connect_signal(self) -> None:
        """
        Connect mouse move signal to update function.
        """
        self._widget.scene().sigMouseMoved.connect(self._mouse_moved)

    def _mouse_moved(self, evt: tuple) -> None:
        """
        Callback function when mouse is moved.
        """
        if not self._manager.get_count():
            return

        # First get current mouse point
        pos = evt

        for plot_name, view in self._views.items():
            rect = view.sceneBoundingRect()

            if rect.contains(pos):
                mouse_point = view.mapSceneToView(pos)
                self._x = to_int(mouse_point.x())
                self._y = mouse_point.y()
                self._plot_name = plot_name
                break

        # Then update cursor component
        self._update_line()
        self._update_label()
        self.update_info()

    def _update_line(self) -> None:
        """"""
        for v_line in self._v_lines.values():
            v_line.setPos(self._x)
            v_line.show()

        for plot_name, h_line in self._h_lines.items():
            if plot_name == self._plot_name:
                h_line.setPos(self._y)
                h_line.show()
            else:
                h_line.hide()

    def _update_label(self) -> None:
        """"""
        bottom_plot = list(self._plots.values())[-1]
        axis_width = bottom_plot.getAxis("right").width()
        axis_height = bottom_plot.getAxis("bottom").height()
        axis_offset = QtCore.QPointF(axis_width, axis_height)

        bottom_view = list(self._views.values())[-1]
        bottom_right = bottom_view.mapSceneToView(
            bottom_view.sceneBoundingRect().bottomRight() - axis_offset
        )

        for plot_name, label in self._y_labels.items():
            if plot_name == self._plot_name:
                label.setText(str(self._y))
                label.show()
                label.setPos(bottom_right.x(), self._y)
            else:
                label.hide()

        dt = self._manager.get_datetime(self._x)
        if dt:
            self._x_label.setText(dt.strftime("%Y-%m-%d %H:%M:%S"))
            self._x_label.show()
            self._x_label.setPos(self._x, bottom_right.y())
            self._x_label.setAnchor((0, 0))

    def update_info(self) -> None:
        """"""
        buf = {}

        for item, plot in self._item_plot_map.items():
            item_info_text = item.get_info_text(self._x)

            if plot not in buf:
                buf[plot] = item_info_text
            else:
                if item_info_text:
                    buf[plot] += ("\n\n" + item_info_text)

        for plot_name, plot in self._plots.items():
            plot_info_text = buf[plot]
            info = self._infos[plot_name]
            info.setText(plot_info_text)
            info.show()

            view = self._views[plot_name]
            top_left = view.mapSceneToView(view.sceneBoundingRect().topLeft())
            info.setPos(top_left)

    def move_right(self) -> None:
        """
        Move cursor index to right by 1.
        """
        if self._x == self._manager.get_count() - 1:
            return
        self._x += 1

        self._update_after_move()

    def move_left(self) -> None:
        """
        Move cursor index to left by 1.
        """
        if self._x == 0:
            return
        self._x -= 1

        self._update_after_move()

    def _update_after_move(self) -> None:
        """
        Update cursor after moved by left/right.
        """
        bar = self._manager.get_bar(self._x)
        self._y = bar.close_price

        self._update_line()
        self._update_label()

    def clear_all(self) -> None:
        """
        Clear all data.
        """
        self._x = 0
        self._y = 0
        self._plot_name = ""

        for line in list(self._v_lines.values()) + list(self._h_lines.values()):
            line.hide()

        for label in list(self._y_labels.values()) + [self._x_label]:
            label.hide()


class NewChartWidget(ChartWidget):
    """"""
    MIN_BAR_COUNT = 100

    strategy_name: str = ""
    signal_cta_history_bar: QtCore.pyqtSignal = QtCore.pyqtSignal(Event)
    signal_cta_tick: QtCore.pyqtSignal = QtCore.pyqtSignal(Event)
    signal_cta_bar: QtCore.pyqtSignal = QtCore.pyqtSignal(Event)

    def __init__(self, parent: QtWidgets.QWidget = None, event_engine: EventEngine = None, strategy_name: str = ""):
        """"""
        super().__init__(parent)

        self.strategy_name = strategy_name

        self.event_engine = event_engine

        self.last_price_line: pg.InfiniteLine = None

    def register_event(self) -> None:
        """"""
        self.signal_cta_history_bar.connect(self.process_cta_history_bar)
        self.event_engine.register(EVENT_CTA_HISTORY_BAR, self.signal_cta_history_bar.emit)

        self.signal_cta_tick.connect(self.process_tick_event)
        self.event_engine.register(EVENT_CTA_TICK, self.signal_cta_tick.emit)

        self.signal_cta_bar.connect(self.process_cta_bar)
        self.event_engine.register(EVENT_CTA_BAR, self.signal_cta_bar.emit)

    def process_cta_history_bar(self, event: Event) -> None:
        """ 处理历史K线推送 """
        strategy_name, history_bars = event.data
        if strategy_name == self.strategy_name:
            self.update_history(history_bars)

    def process_tick_event(self, event: Event) -> None:
        """ 处理tick数据推送 """
        strategy_name, tick = event.data
        if strategy_name == self.strategy_name:
            if self.last_price_line:
                self.last_price_line.setValue(tick.last_price)

    def process_cta_bar(self, event: Event) -> None:
        """ 处理K线数据推送 """

        strategy_name, bar = event.data
        if strategy_name == self.strategy_name:
            self.update_bar(bar)

    def add_last_price_line(self):
        """"""
        plot = list(self._plots.values())[0]
        color = (255, 255, 0)

        self.last_price_line = pg.InfiniteLine(
            angle=0,
            movable=False,
            label="{value}",
            pen=pg.mkPen(color, width=1, style=QtCore.Qt.DashDotLine),
            labelOpts={
                "color": color,
                "position": 1,
                "anchors": [(1, 1), (1, 1)]
            }
        )
        self.last_price_line.label.setFont(NORMAL_FONT)
        plot.addItem(self.last_price_line)

    def update_history(self, history: List[BarData]) -> None:
        """
        Update a list of bar data.
        """
        self._manager.update_history(history)

        for item in self._items.values():
            item.update_history(history)

        self._update_plot_limits()

        self.move_to_right()

        self.update_last_price_line(history[-1])

    def update_bar(self, bar: BarData) -> None:
        """
        Update single bar data.
        """
        self._manager.update_bar(bar)

        for item in self._items.values():
            item.update_bar(bar)

        self._update_plot_limits()

        if self._right_ix >= (self._manager.get_count() - self._bar_count / 2):
            self.move_to_right()

        self.update_last_price_line(bar)

    def update_last_price_line(self, bar: BarData) -> None:
        """"""
        if self.last_price_line:
            self.last_price_line.setValue(bar.close_price)

4. vnpy/app/cta_backtester/ui/widget.py

import csv
from datetime import datetime, timedelta
from copy import copy

import numpy as np
import pyqtgraph as pg

from vnpy.trader.constant import Interval, Direction, Exchange
from vnpy.trader.engine import MainEngine
from vnpy.trader.ui import QtCore, QtWidgets, QtGui
from vnpy.trader.ui.widget import BaseMonitor, BaseCell, DirectionCell, EnumCell
from vnpy.trader.ui.editor import CodeEditor
from vnpy.event import Event, EventEngine
from vnpy.chart import NewChartWidget, CandleItem, VolumeItem, LineItem, SmaItem, RsiItem, MacdItem
from vnpy.trader.utility import load_json, save_json
from vnpy.trader.database import DB_TZ

from ..engine import (
    APP_NAME,
    EVENT_BACKTESTER_LOG,
    EVENT_BACKTESTER_BACKTESTING_FINISHED,
    EVENT_BACKTESTER_OPTIMIZATION_FINISHED,
    OptimizationSetting
)


class BacktesterManager(QtWidgets.QWidget):
    """"""

    setting_filename = "cta_backtester_setting.json"

    signal_log = QtCore.pyqtSignal(Event)
    signal_backtesting_finished = QtCore.pyqtSignal(Event)
    signal_optimization_finished = QtCore.pyqtSignal(Event)

    def __init__(self, main_engine: MainEngine, event_engine: EventEngine):
        """"""
        super().__init__()

        self.main_engine = main_engine
        self.event_engine = event_engine

        self.backtester_engine = main_engine.get_engine(APP_NAME)
        self.class_names = []
        self.settings = {}

        self.target_display = ""

        self.init_ui()
        self.register_event()
        self.backtester_engine.init_engine()
        self.init_strategy_settings()
        self.load_backtesting_setting()

    def init_strategy_settings(self):
        """"""
        self.class_names = self.backtester_engine.get_strategy_class_names()

        for class_name in self.class_names:
            setting = self.backtester_engine.get_default_setting(class_name)
            self.settings[class_name] = setting

        self.class_combo.addItems(self.class_names)

    def init_ui(self):
        """"""
        self.setWindowTitle("CTA回测")

        # Setting Part
        self.class_combo = QtWidgets.QComboBox()

        self.symbol_line = QtWidgets.QLineEdit("IF88.CFFEX")

        self.interval_combo = QtWidgets.QComboBox()
        for interval in Interval:
            self.interval_combo.addItem(interval.value)

        end_dt = datetime.now()
        start_dt = end_dt - timedelta(days=3 * 365)

        self.start_date_edit = QtWidgets.QDateEdit(
            QtCore.QDate(
                start_dt.year,
                start_dt.month,
                start_dt.day
            )
        )
        self.end_date_edit = QtWidgets.QDateEdit(
            QtCore.QDate.currentDate()
        )

        self.rate_line = QtWidgets.QLineEdit("0.000025")
        self.slippage_line = QtWidgets.QLineEdit("0.2")
        self.size_line = QtWidgets.QLineEdit("300")
        self.pricetick_line = QtWidgets.QLineEdit("0.2")
        self.capital_line = QtWidgets.QLineEdit("1000000")

        self.inverse_combo = QtWidgets.QComboBox()
        self.inverse_combo.addItems(["正向", "反向"])

        backtesting_button = QtWidgets.QPushButton("开始回测")
        backtesting_button.clicked.connect(self.start_backtesting)

        optimization_button = QtWidgets.QPushButton("参数优化")
        optimization_button.clicked.connect(self.start_optimization)

        self.result_button = QtWidgets.QPushButton("优化结果")
        self.result_button.clicked.connect(self.show_optimization_result)
        self.result_button.setEnabled(False)

        downloading_button = QtWidgets.QPushButton("下载数据")
        downloading_button.clicked.connect(self.start_downloading)

        self.order_button = QtWidgets.QPushButton("委托记录")
        self.order_button.clicked.connect(self.show_backtesting_orders)
        self.order_button.setEnabled(False)

        self.trade_button = QtWidgets.QPushButton("成交记录")
        self.trade_button.clicked.connect(self.show_backtesting_trades)
        self.trade_button.setEnabled(False)

        self.daily_button = QtWidgets.QPushButton("每日盈亏")
        self.daily_button.clicked.connect(self.show_daily_results)
        self.daily_button.setEnabled(False)

        self.candle_button = QtWidgets.QPushButton("K线图表")
        self.candle_button.clicked.connect(self.show_candle_chart)
        self.candle_button.setEnabled(False)

        edit_button = QtWidgets.QPushButton("代码编辑")
        edit_button.clicked.connect(self.edit_strategy_code)

        reload_button = QtWidgets.QPushButton("策略重载")
        reload_button.clicked.connect(self.reload_strategy_class)

        for button in [
            backtesting_button,
            optimization_button,
            downloading_button,
            self.result_button,
            self.order_button,
            self.trade_button,
            self.daily_button,
            self.candle_button,
            edit_button,
            reload_button
        ]:
            button.setFixedHeight(button.sizeHint().height() * 2)

        form = QtWidgets.QFormLayout()
        form.addRow("交易策略", self.class_combo)
        form.addRow("本地代码", self.symbol_line)
        form.addRow("K线周期", self.interval_combo)
        form.addRow("开始日期", self.start_date_edit)
        form.addRow("结束日期", self.end_date_edit)
        form.addRow("手续费率", self.rate_line)
        form.addRow("交易滑点", self.slippage_line)
        form.addRow("合约乘数", self.size_line)
        form.addRow("价格跳动", self.pricetick_line)
        form.addRow("回测资金", self.capital_line)
        form.addRow("合约模式", self.inverse_combo)

        result_grid = QtWidgets.QGridLayout()
        result_grid.addWidget(self.trade_button, 0, 0)
        result_grid.addWidget(self.order_button, 0, 1)
        result_grid.addWidget(self.daily_button, 1, 0)
        result_grid.addWidget(self.candle_button, 1, 1)

        left_vbox = QtWidgets.QVBoxLayout()
        left_vbox.addLayout(form)
        left_vbox.addWidget(backtesting_button)
        left_vbox.addWidget(downloading_button)
        left_vbox.addStretch()
        left_vbox.addLayout(result_grid)
        left_vbox.addStretch()
        left_vbox.addWidget(optimization_button)
        left_vbox.addWidget(self.result_button)
        left_vbox.addStretch()
        left_vbox.addWidget(edit_button)
        left_vbox.addWidget(reload_button)

        # Result part
        self.statistics_monitor = StatisticsMonitor()

        self.log_monitor = QtWidgets.QTextEdit()
        self.log_monitor.setMaximumHeight(400)

        self.chart = BacktesterChart()
        self.chart.setMinimumWidth(1000)

        self.trade_dialog = BacktestingResultDialog(
            self.main_engine,
            self.event_engine,
            "回测成交记录",
            BacktestingTradeMonitor
        )
        self.order_dialog = BacktestingResultDialog(
            self.main_engine,
            self.event_engine,
            "回测委托记录",
            BacktestingOrderMonitor
        )
        self.daily_dialog = BacktestingResultDialog(
            self.main_engine,
            self.event_engine,
            "回测每日盈亏",
            DailyResultMonitor
        )

        # Candle Chart
        self.candle_dialog = CandleChartDialog()

        # Layout
        vbox = QtWidgets.QVBoxLayout()
        vbox.addWidget(self.statistics_monitor)
        vbox.addWidget(self.log_monitor)

        hbox = QtWidgets.QHBoxLayout()
        hbox.addLayout(left_vbox)
        hbox.addLayout(vbox)
        hbox.addWidget(self.chart)
        self.setLayout(hbox)

        # Code Editor
        self.editor = CodeEditor(self.main_engine, self.event_engine)

    def load_backtesting_setting(self):
        """"""
        setting = load_json(self.setting_filename)
        if not setting:
            return

        self.class_combo.setCurrentIndex(
            self.class_combo.findText(setting["class_name"])
        )

        self.symbol_line.setText(setting["vt_symbol"])

        self.interval_combo.setCurrentIndex(
            self.interval_combo.findText(setting["interval"])
        )

        start_str = setting.get("start", "")
        if start_str:
            start_dt = QtCore.QDate.fromString(start_str, "yyyy-MM-dd")
            self.start_date_edit.setDate(start_dt)

        self.rate_line.setText(str(setting["rate"]))
        self.slippage_line.setText(str(setting["slippage"]))
        self.size_line.setText(str(setting["size"]))
        self.pricetick_line.setText(str(setting["pricetick"]))
        self.capital_line.setText(str(setting["capital"]))

        if not setting["inverse"]:
            self.inverse_combo.setCurrentIndex(0)
        else:
            self.inverse_combo.setCurrentIndex(1)

    def register_event(self):
        """"""
        self.signal_log.connect(self.process_log_event)
        self.signal_backtesting_finished.connect(
            self.process_backtesting_finished_event)
        self.signal_optimization_finished.connect(
            self.process_optimization_finished_event)

        self.event_engine.register(EVENT_BACKTESTER_LOG, self.signal_log.emit)
        self.event_engine.register(
            EVENT_BACKTESTER_BACKTESTING_FINISHED, self.signal_backtesting_finished.emit)
        self.event_engine.register(
            EVENT_BACKTESTER_OPTIMIZATION_FINISHED, self.signal_optimization_finished.emit)

    def process_log_event(self, event: Event):
        """"""
        msg = event.data
        self.write_log(msg)

    def write_log(self, msg):
        """"""
        timestamp = datetime.now().strftime("%H:%M:%S")
        msg = f"{timestamp}\t{msg}"
        self.log_monitor.append(msg)

    def process_backtesting_finished_event(self, event: Event):
        """"""
        statistics = self.backtester_engine.get_result_statistics()
        self.statistics_monitor.set_data(statistics)

        df = self.backtester_engine.get_result_df()
        self.chart.set_data(df)

        self.trade_button.setEnabled(True)
        self.order_button.setEnabled(True)
        self.daily_button.setEnabled(True)

        # Tick data can not be displayed using candle chart
        interval = self.interval_combo.currentText()
        if interval != Interval.TICK.value:
            self.candle_button.setEnabled(True)

    def process_optimization_finished_event(self, event: Event):
        """"""
        self.write_log("请点击[优化结果]按钮查看")
        self.result_button.setEnabled(True)

    def start_backtesting(self):
        """"""
        class_name = self.class_combo.currentText()
        vt_symbol = self.symbol_line.text()
        interval = self.interval_combo.currentText()
        start = self.start_date_edit.dateTime().toPyDateTime()
        end = self.end_date_edit.dateTime().toPyDateTime()
        rate = float(self.rate_line.text())
        slippage = float(self.slippage_line.text())
        size = float(self.size_line.text())
        pricetick = float(self.pricetick_line.text())
        capital = float(self.capital_line.text())

        if self.inverse_combo.currentText() == "正向":
            inverse = False
        else:
            inverse = True

        # Check validity of vt_symbol
        if "." not in vt_symbol:
            self.write_log("本地代码缺失交易所后缀,请检查")
            return

        _, exchange_str = vt_symbol.split(".")
        if exchange_str not in Exchange.__members__:
            self.write_log("本地代码的交易所后缀不正确,请检查")
            return

        # Save backtesting parameters
        backtesting_setting = {
            "class_name": class_name,
            "vt_symbol": vt_symbol,
            "interval": interval,
            "start": start.isoformat(),
            "rate": rate,
            "slippage": slippage,
            "size": size,
            "pricetick": pricetick,
            "capital": capital,
            "inverse": inverse,
        }
        save_json(self.setting_filename, backtesting_setting)

        # Get strategy setting
        old_setting = self.settings[class_name]
        dialog = BacktestingSettingEditor(class_name, old_setting)
        i = dialog.exec()
        if i != dialog.Accepted:
            return

        new_setting = dialog.get_setting()
        self.settings[class_name] = new_setting

        result = self.backtester_engine.start_backtesting(
            class_name,
            vt_symbol,
            interval,
            start,
            end,
            rate,
            slippage,
            size,
            pricetick,
            capital,
            inverse,
            new_setting
        )

        if result:
            self.statistics_monitor.clear_data()
            self.chart.clear_data()

            self.trade_button.setEnabled(False)
            self.order_button.setEnabled(False)
            self.daily_button.setEnabled(False)
            self.candle_button.setEnabled(False)

            self.trade_dialog.clear_data()
            self.order_dialog.clear_data()
            self.daily_dialog.clear_data()
            self.candle_dialog.clear_data()

    def start_optimization(self):
        """"""
        class_name = self.class_combo.currentText()
        vt_symbol = self.symbol_line.text()
        interval = self.interval_combo.currentText()
        start = self.start_date_edit.dateTime().toPyDateTime()
        end = self.end_date_edit.dateTime().toPyDateTime()
        rate = float(self.rate_line.text())
        slippage = float(self.slippage_line.text())
        size = float(self.size_line.text())
        pricetick = float(self.pricetick_line.text())
        capital = float(self.capital_line.text())

        if self.inverse_combo.currentText() == "正向":
            inverse = False
        else:
            inverse = True

        parameters = self.settings[class_name]
        dialog = OptimizationSettingEditor(class_name, parameters)
        i = dialog.exec()
        if i != dialog.Accepted:
            return

        optimization_setting, use_ga = dialog.get_setting()
        self.target_display = dialog.target_display

        self.backtester_engine.start_optimization(
            class_name,
            vt_symbol,
            interval,
            start,
            end,
            rate,
            slippage,
            size,
            pricetick,
            capital,
            inverse,
            optimization_setting,
            use_ga
        )

        self.result_button.setEnabled(False)

    def start_downloading(self):
        """"""
        vt_symbol = self.symbol_line.text()
        interval = self.interval_combo.currentText()
        start_date = self.start_date_edit.date()
        end_date = self.end_date_edit.date()

        start = datetime(
            start_date.year(),
            start_date.month(),
            start_date.day(),
        )
        start = DB_TZ.localize(start)

        end = datetime(
            end_date.year(),
            end_date.month(),
            end_date.day(),
            23,
            59,
            59,
        )
        end = DB_TZ.localize(end)

        self.backtester_engine.start_downloading(
            vt_symbol,
            interval,
            start,
            end
        )

    def show_optimization_result(self):
        """"""
        result_values = self.backtester_engine.get_result_values()

        dialog = OptimizationResultMonitor(
            result_values,
            self.target_display
        )
        dialog.exec_()

    def show_backtesting_trades(self):
        """"""
        if not self.trade_dialog.is_updated():
            trades = self.backtester_engine.get_all_trades()
            self.trade_dialog.update_data(trades)

        self.trade_dialog.exec_()

    def show_backtesting_orders(self):
        """"""
        if not self.order_dialog.is_updated():
            orders = self.backtester_engine.get_all_orders()
            self.order_dialog.update_data(orders)

        self.order_dialog.exec_()

    def show_daily_results(self):
        """"""
        if not self.daily_dialog.is_updated():
            results = self.backtester_engine.get_all_daily_results()
            self.daily_dialog.update_data(results)

        self.daily_dialog.exec_()

    def show_candle_chart(self):
        """"""
        if not self.candle_dialog.is_updated():
            history = self.backtester_engine.get_history_data()
            self.candle_dialog.update_history(history)

            trades = self.backtester_engine.get_all_trades()
            self.candle_dialog.update_trades(trades)

        self.candle_dialog.exec_()

    def edit_strategy_code(self):
        """"""
        class_name = self.class_combo.currentText()
        file_path = self.backtester_engine.get_strategy_class_file(class_name)

        self.editor.open_editor(file_path)
        self.editor.show()

    def reload_strategy_class(self):
        """"""
        self.backtester_engine.reload_strategy_class()

        current_strategy_name = self.class_combo.currentText()

        self.class_combo.clear()
        self.init_strategy_settings()

        ix = self.class_combo.findText(current_strategy_name)
        self.class_combo.setCurrentIndex(ix)

    def show(self):
        """"""
        self.showMaximized()


class StatisticsMonitor(QtWidgets.QTableWidget):
    """"""
    KEY_NAME_MAP = {
        "start_date": "首个交易日",
        "end_date": "最后交易日",

        "total_days": "总交易日",
        "profit_days": "盈利交易日",
        "loss_days": "亏损交易日",

        "capital": "起始资金",
        "end_balance": "结束资金",

        "total_return": "总收益率",
        "annual_return": "年化收益",
        "max_drawdown": "最大回撤",
        "max_ddpercent": "百分比最大回撤",

        "total_net_pnl": "总盈亏",
        "total_commission": "总手续费",
        "total_slippage": "总滑点",
        "total_turnover": "总成交额",
        "total_trade_count": "总成交笔数",

        "daily_net_pnl": "日均盈亏",
        "daily_commission": "日均手续费",
        "daily_slippage": "日均滑点",
        "daily_turnover": "日均成交额",
        "daily_trade_count": "日均成交笔数",

        "daily_return": "日均收益率",
        "return_std": "收益标准差",
        "sharpe_ratio": "夏普比率",
        "return_drawdown_ratio": "收益回撤比"
    }

    def __init__(self):
        """"""
        super().__init__()

        self.cells = {}

        self.init_ui()

    def init_ui(self):
        """"""
        self.setRowCount(len(self.KEY_NAME_MAP))
        self.setVerticalHeaderLabels(list(self.KEY_NAME_MAP.values()))

        self.setColumnCount(1)
        self.horizontalHeader().setVisible(False)
        self.horizontalHeader().setSectionResizeMode(
            QtWidgets.QHeaderView.Stretch
        )
        self.setEditTriggers(self.NoEditTriggers)

        for row, key in enumerate(self.KEY_NAME_MAP.keys()):
            cell = QtWidgets.QTableWidgetItem()
            self.setItem(row, 0, cell)
            self.cells[key] = cell

    def clear_data(self):
        """"""
        for cell in self.cells.values():
            cell.setText("")

    def set_data(self, data: dict):
        """"""
        data["capital"] = f"{data['capital']:,.2f}"
        data["end_balance"] = f"{data['end_balance']:,.2f}"
        data["total_return"] = f"{data['total_return']:,.2f}%"
        data["annual_return"] = f"{data['annual_return']:,.2f}%"
        data["max_drawdown"] = f"{data['max_drawdown']:,.2f}"
        data["max_ddpercent"] = f"{data['max_ddpercent']:,.2f}%"
        data["total_net_pnl"] = f"{data['total_net_pnl']:,.2f}"
        data["total_commission"] = f"{data['total_commission']:,.2f}"
        data["total_slippage"] = f"{data['total_slippage']:,.2f}"
        data["total_turnover"] = f"{data['total_turnover']:,.2f}"
        data["daily_net_pnl"] = f"{data['daily_net_pnl']:,.2f}"
        data["daily_commission"] = f"{data['daily_commission']:,.2f}"
        data["daily_slippage"] = f"{data['daily_slippage']:,.2f}"
        data["daily_turnover"] = f"{data['daily_turnover']:,.2f}"
        data["daily_trade_count"] = f"{data['daily_trade_count']:,.2f}"
        data["daily_return"] = f"{data['daily_return']:,.2f}%"
        data["return_std"] = f"{data['return_std']:,.2f}%"
        data["sharpe_ratio"] = f"{data['sharpe_ratio']:,.2f}"
        data["return_drawdown_ratio"] = f"{data['return_drawdown_ratio']:,.2f}"

        for key, cell in self.cells.items():
            value = data.get(key, "")
            cell.setText(str(value))


class BacktestingSettingEditor(QtWidgets.QDialog):
    """
    For creating new strategy and editing strategy parameters.
    """

    def __init__(
        self, class_name: str, parameters: dict
    ):
        """"""
        super(BacktestingSettingEditor, self).__init__()

        self.class_name = class_name
        self.parameters = parameters
        self.edits = {}

        self.init_ui()

    def init_ui(self):
        """"""
        form = QtWidgets.QFormLayout()

        # Add vt_symbol and name edit if add new strategy
        self.setWindowTitle(f"策略参数配置:{self.class_name}")
        button_text = "确定"
        parameters = self.parameters

        for name, value in parameters.items():
            type_ = type(value)

            edit = QtWidgets.QLineEdit(str(value))
            if type_ is int:
                validator = QtGui.QIntValidator()
                edit.setValidator(validator)
            elif type_ is float:
                validator = QtGui.QDoubleValidator()
                edit.setValidator(validator)

            form.addRow(f"{name} {type_}", edit)

            self.edits[name] = (edit, type_)

        button = QtWidgets.QPushButton(button_text)
        button.clicked.connect(self.accept)
        form.addRow(button)

        widget = QtWidgets.QWidget()
        widget.setLayout(form)

        scroll = QtWidgets.QScrollArea()
        scroll.setWidgetResizable(True)
        scroll.setWidget(widget)

        vbox = QtWidgets.QVBoxLayout()
        vbox.addWidget(scroll)
        self.setLayout(vbox)

    def get_setting(self):
        """"""
        setting = {}

        for name, tp in self.edits.items():
            edit, type_ = tp
            value_text = edit.text()

            if type_ == bool:
                if value_text == "True":
                    value = True
                else:
                    value = False
            else:
                value = type_(value_text)

            setting[name] = value

        return setting


class BacktesterChart(pg.GraphicsWindow):
    """"""

    def __init__(self):
        """"""
        super().__init__(title="Backtester Chart")

        self.dates = {}

        self.init_ui()

    def init_ui(self):
        """"""
        pg.setConfigOptions(antialias=True)

        # Create plot widgets
        self.balance_plot = self.addPlot(
            title="账户净值",
            axisItems={"bottom": DateAxis(self.dates, orientation="bottom")}
        )
        self.nextRow()

        self.drawdown_plot = self.addPlot(
            title="净值回撤",
            axisItems={"bottom": DateAxis(self.dates, orientation="bottom")}
        )
        self.nextRow()

        self.pnl_plot = self.addPlot(
            title="每日盈亏",
            axisItems={"bottom": DateAxis(self.dates, orientation="bottom")}
        )
        self.nextRow()

        self.distribution_plot = self.addPlot(title="盈亏分布")

        # Add curves and bars on plot widgets
        self.balance_curve = self.balance_plot.plot(
            pen=pg.mkPen("#ffc107", width=3)
        )

        dd_color = "#303f9f"
        self.drawdown_curve = self.drawdown_plot.plot(
            fillLevel=-0.3, brush=dd_color, pen=dd_color
        )

        profit_color = 'r'
        loss_color = 'g'
        self.profit_pnl_bar = pg.BarGraphItem(
            x=[], height=[], width=0.3, brush=profit_color, pen=profit_color
        )
        self.loss_pnl_bar = pg.BarGraphItem(
            x=[], height=[], width=0.3, brush=loss_color, pen=loss_color
        )
        self.pnl_plot.addItem(self.profit_pnl_bar)
        self.pnl_plot.addItem(self.loss_pnl_bar)

        distribution_color = "#6d4c41"
        self.distribution_curve = self.distribution_plot.plot(
            fillLevel=-0.3, brush=distribution_color, pen=distribution_color
        )

    def clear_data(self):
        """"""
        self.balance_curve.setData([], [])
        self.drawdown_curve.setData([], [])
        self.profit_pnl_bar.setOpts(x=[], height=[])
        self.loss_pnl_bar.setOpts(x=[], height=[])
        self.distribution_curve.setData([], [])

    def set_data(self, df):
        """"""
        if df is None:
            return

        count = len(df)

        self.dates.clear()
        for n, date in enumerate(df.index):
            self.dates[n] = date

        # Set data for curve of balance and drawdown
        self.balance_curve.setData(df["balance"])
        self.drawdown_curve.setData(df["drawdown"])

        # Set data for daily pnl bar
        profit_pnl_x = []
        profit_pnl_height = []
        loss_pnl_x = []
        loss_pnl_height = []

        for count, pnl in enumerate(df["net_pnl"]):
            if pnl >= 0:
                profit_pnl_height.append(pnl)
                profit_pnl_x.append(count)
            else:
                loss_pnl_height.append(pnl)
                loss_pnl_x.append(count)

        self.profit_pnl_bar.setOpts(x=profit_pnl_x, height=profit_pnl_height)
        self.loss_pnl_bar.setOpts(x=loss_pnl_x, height=loss_pnl_height)

        # Set data for pnl distribution
        hist, x = np.histogram(df["net_pnl"], bins="auto")
        x = x[:-1]
        self.distribution_curve.setData(x, hist)


class DateAxis(pg.AxisItem):
    """Axis for showing date data"""

    def __init__(self, dates: dict, *args, **kwargs):
        """"""
        super().__init__(*args, **kwargs)
        self.dates = dates

    def tickStrings(self, values, scale, spacing):
        """"""
        strings = []
        for v in values:
            dt = self.dates.get(v, "")
            strings.append(str(dt))
        return strings


class OptimizationSettingEditor(QtWidgets.QDialog):
    """
    For setting up parameters for optimization.
    """
    DISPLAY_NAME_MAP = {
        "总收益率": "total_return",
        "夏普比率": "sharpe_ratio",
        "收益回撤比": "return_drawdown_ratio",
        "日均盈亏": "daily_net_pnl"
    }

    def __init__(
        self, class_name: str, parameters: dict
    ):
        """"""
        super().__init__()

        self.class_name = class_name
        self.parameters = parameters
        self.edits = {}

        self.optimization_setting = None
        self.use_ga = False

        self.init_ui()

    def init_ui(self):
        """"""
        QLabel = QtWidgets.QLabel

        self.target_combo = QtWidgets.QComboBox()
        self.target_combo.addItems(list(self.DISPLAY_NAME_MAP.keys()))

        grid = QtWidgets.QGridLayout()
        grid.addWidget(QLabel("目标"), 0, 0)
        grid.addWidget(self.target_combo, 0, 1, 1, 3)
        grid.addWidget(QLabel("参数"), 1, 0)
        grid.addWidget(QLabel("开始"), 1, 1)
        grid.addWidget(QLabel("步进"), 1, 2)
        grid.addWidget(QLabel("结束"), 1, 3)

        # Add vt_symbol and name edit if add new strategy
        self.setWindowTitle(f"优化参数配置:{self.class_name}")

        validator = QtGui.QDoubleValidator()
        row = 2

        for name, value in self.parameters.items():
            type_ = type(value)
            if type_ not in [int, float]:
                continue

            start_edit = QtWidgets.QLineEdit(str(value))
            step_edit = QtWidgets.QLineEdit(str(1))
            end_edit = QtWidgets.QLineEdit(str(value))

            for edit in [start_edit, step_edit, end_edit]:
                edit.setValidator(validator)

            grid.addWidget(QLabel(name), row, 0)
            grid.addWidget(start_edit, row, 1)
            grid.addWidget(step_edit, row, 2)
            grid.addWidget(end_edit, row, 3)

            self.edits[name] = {
                "type": type_,
                "start": start_edit,
                "step": step_edit,
                "end": end_edit
            }

            row += 1

        parallel_button = QtWidgets.QPushButton("多进程优化")
        parallel_button.clicked.connect(self.generate_parallel_setting)
        grid.addWidget(parallel_button, row, 0, 1, 4)

        row += 1
        ga_button = QtWidgets.QPushButton("遗传算法优化")
        ga_button.clicked.connect(self.generate_ga_setting)
        grid.addWidget(ga_button, row, 0, 1, 4)

        widget = QtWidgets.QWidget()
        widget.setLayout(grid)

        scroll = QtWidgets.QScrollArea()
        scroll.setWidgetResizable(True)
        scroll.setWidget(widget)

        vbox = QtWidgets.QVBoxLayout()
        vbox.addWidget(scroll)
        self.setLayout(vbox)

    def generate_ga_setting(self):
        """"""
        self.use_ga = True
        self.generate_setting()

    def generate_parallel_setting(self):
        """"""
        self.use_ga = False
        self.generate_setting()

    def generate_setting(self):
        """"""
        self.optimization_setting = OptimizationSetting()

        self.target_display = self.target_combo.currentText()
        target_name = self.DISPLAY_NAME_MAP[self.target_display]
        self.optimization_setting.set_target(target_name)

        for name, d in self.edits.items():
            type_ = d["type"]
            start_value = type_(d["start"].text())
            step_value = type_(d["step"].text())
            end_value = type_(d["end"].text())

            if start_value == end_value:
                self.optimization_setting.add_parameter(name, start_value)
            else:
                self.optimization_setting.add_parameter(
                    name,
                    start_value,
                    end_value,
                    step_value
                )

        self.accept()

    def get_setting(self):
        """"""
        return self.optimization_setting, self.use_ga


class OptimizationResultMonitor(QtWidgets.QDialog):
    """
    For viewing optimization result.
    """

    def __init__(
        self, result_values: list, target_display: str
    ):
        """"""
        super().__init__()

        self.result_values = result_values
        self.target_display = target_display

        self.init_ui()

    def init_ui(self):
        """"""
        self.setWindowTitle("参数优化结果")
        self.resize(1100, 500)

        # Creat table to show result
        table = QtWidgets.QTableWidget()

        table.setColumnCount(2)
        table.setRowCount(len(self.result_values))
        table.setHorizontalHeaderLabels(["参数", self.target_display])
        table.setEditTriggers(table.NoEditTriggers)
        table.verticalHeader().setVisible(False)

        table.horizontalHeader().setSectionResizeMode(
            0, QtWidgets.QHeaderView.ResizeToContents
        )
        table.horizontalHeader().setSectionResizeMode(
            1, QtWidgets.QHeaderView.Stretch
        )

        for n, tp in enumerate(self.result_values):
            setting, target_value, _ = tp
            setting_cell = QtWidgets.QTableWidgetItem(str(setting))
            target_cell = QtWidgets.QTableWidgetItem(f"{target_value:.2f}")

            setting_cell.setTextAlignment(QtCore.Qt.AlignCenter)
            target_cell.setTextAlignment(QtCore.Qt.AlignCenter)

            table.setItem(n, 0, setting_cell)
            table.setItem(n, 1, target_cell)

        # Create layout
        button = QtWidgets.QPushButton("保存")
        button.clicked.connect(self.save_csv)

        hbox = QtWidgets.QHBoxLayout()
        hbox.addStretch()
        hbox.addWidget(button)

        vbox = QtWidgets.QVBoxLayout()
        vbox.addWidget(table)
        vbox.addLayout(hbox)

        self.setLayout(vbox)

    def save_csv(self) -> None:
        """
        Save table data into a csv file
        """
        path, _ = QtWidgets.QFileDialog.getSaveFileName(
            self, "保存数据", "", "CSV(*.csv)")

        if not path:
            return

        with open(path, "w") as f:
            writer = csv.writer(f, lineterminator="\n")

            writer.writerow(["参数", self.target_display])

            for tp in self.result_values:
                setting, target_value, _ = tp
                row_data = [str(setting), str(target_value)]
                writer.writerow(row_data)


class BacktestingTradeMonitor(BaseMonitor):
    """
    Monitor for backtesting trade data.
    """

    headers = {
        "tradeid": {"display": "成交号 ", "cell": BaseCell, "update": False},
        "orderid": {"display": "委托号", "cell": BaseCell, "update": False},
        "symbol": {"display": "代码", "cell": BaseCell, "update": False},
        "exchange": {"display": "交易所", "cell": EnumCell, "update": False},
        "direction": {"display": "方向", "cell": DirectionCell, "update": False},
        "offset": {"display": "开平", "cell": EnumCell, "update": False},
        "price": {"display": "价格", "cell": BaseCell, "update": False},
        "volume": {"display": "数量", "cell": BaseCell, "update": False},
        "datetime": {"display": "时间", "cell": BaseCell, "update": False},
        "gateway_name": {"display": "接口", "cell": BaseCell, "update": False},
    }


class BacktestingOrderMonitor(BaseMonitor):
    """
    Monitor for backtesting order data.
    """

    headers = {
        "orderid": {"display": "委托号", "cell": BaseCell, "update": False},
        "symbol": {"display": "代码", "cell": BaseCell, "update": False},
        "exchange": {"display": "交易所", "cell": EnumCell, "update": False},
        "type": {"display": "类型", "cell": EnumCell, "update": False},
        "direction": {"display": "方向", "cell": DirectionCell, "update": False},
        "offset": {"display": "开平", "cell": EnumCell, "update": False},
        "price": {"display": "价格", "cell": BaseCell, "update": False},
        "volume": {"display": "总数量", "cell": BaseCell, "update": False},
        "traded": {"display": "已成交", "cell": BaseCell, "update": False},
        "status": {"display": "状态", "cell": EnumCell, "update": False},
        "datetime": {"display": "时间", "cell": BaseCell, "update": False},
        "gateway_name": {"display": "接口", "cell": BaseCell, "update": False},
    }


class FloatCell(BaseCell):
    """
    Cell used for showing pnl data.
    """

    def __init__(self, content, data):
        """"""
        content = f"{content:.2f}"
        super().__init__(content, data)


class DailyResultMonitor(BaseMonitor):
    """
    Monitor for backtesting daily result.
    """

    headers = {
        "date": {"display": "日期", "cell": BaseCell, "update": False},
        "trade_count": {"display": "成交笔数", "cell": BaseCell, "update": False},
        "start_pos": {"display": "开盘持仓", "cell": BaseCell, "update": False},
        "end_pos": {"display": "收盘持仓", "cell": BaseCell, "update": False},
        "turnover": {"display": "成交额", "cell": FloatCell, "update": False},
        "commission": {"display": "手续费", "cell": FloatCell, "update": False},
        "slippage": {"display": "滑点", "cell": FloatCell, "update": False},
        "trading_pnl": {"display": "交易盈亏", "cell": FloatCell, "update": False},
        "holding_pnl": {"display": "持仓盈亏", "cell": FloatCell, "update": False},
        "total_pnl": {"display": "总盈亏", "cell": FloatCell, "update": False},
        "net_pnl": {"display": "净盈亏", "cell": FloatCell, "update": False},
    }


class BacktestingResultDialog(QtWidgets.QDialog):
    """
    """

    def __init__(
        self,
        main_engine: MainEngine,
        event_engine: EventEngine,
        title: str,
        table_class: QtWidgets.QTableWidget
    ):
        """"""
        super().__init__()

        self.main_engine = main_engine
        self.event_engine = event_engine
        self.title = title
        self.table_class = table_class

        self.updated = False

        self.init_ui()

    def init_ui(self):
        """"""
        self.setWindowTitle(self.title)
        self.resize(1100, 600)

        self.table = self.table_class(self.main_engine, self.event_engine)

        vbox = QtWidgets.QVBoxLayout()
        vbox.addWidget(self.table)

        self.setLayout(vbox)

    def clear_data(self):
        """"""
        self.updated = False
        self.table.setRowCount(0)

    def update_data(self, data: list):
        """"""
        self.updated = True

        data.reverse()
        for obj in data:
            self.table.insert_new_row(obj)

    def is_updated(self):
        """"""
        return self.updated


class CandleChartDialog(QtWidgets.QDialog):
    """
    """

    def __init__(self):
        """"""
        super().__init__()

        self.updated = False

        self.dt_ix_map = {}
        self.ix_bar_map = {}

        self.high_price = 0
        self.low_price = 0
        self.price_range = 0

        self.items = []

        self.init_ui()

    def init_ui(self):
        """"""
        self.setWindowTitle("回测K线图表")
        self.resize(1400, 800)

        # Create chart widget
        self.chart = NewChartWidget()
        self.chart.add_plot("candle", hide_x_axis=True)
        self.chart.add_plot("volume", maximum_height=200)
        self.chart.add_plot("rsi", maximum_height=150)
        self.chart.add_plot("macd", maximum_height=150)
        self.chart.add_item(CandleItem, "candle", "candle")
        self.chart.add_item(VolumeItem, "volume", "volume")

        self.chart.add_item(SmaItem, "sma", "candle")
        self.chart.add_item(RsiItem, "rsi", "rsi")
        self.chart.add_item(MacdItem, "macd", "macd")
        self.chart.add_last_price_line()
        self.chart.add_cursor()

        # Create help widget
        text1 = "红色虚线 —— 盈利交易"
        label1 = QtWidgets.QLabel(text1)
        label1.setStyleSheet("color:red")

        text2 = "绿色虚线 —— 亏损交易"
        label2 = QtWidgets.QLabel(text2)
        label2.setStyleSheet("color:#00FF00")

        text3 = "黄色向上箭头 —— 买入开仓 Buy"
        label3 = QtWidgets.QLabel(text3)
        label3.setStyleSheet("color:yellow")

        text4 = "黄色向下箭头 —— 卖出平仓 Sell"
        label4 = QtWidgets.QLabel(text4)
        label4.setStyleSheet("color:yellow")

        text5 = "紫红向下箭头 —— 卖出开仓 Short"
        label5 = QtWidgets.QLabel(text5)
        label5.setStyleSheet("color:magenta")

        text6 = "紫红向上箭头 —— 买入平仓 Cover"
        label6 = QtWidgets.QLabel(text6)
        label6.setStyleSheet("color:magenta")

        hbox1 = QtWidgets.QHBoxLayout()
        hbox1.addStretch()
        hbox1.addWidget(label1)
        hbox1.addStretch()
        hbox1.addWidget(label2)
        hbox1.addStretch()

        hbox2 = QtWidgets.QHBoxLayout()
        hbox2.addStretch()
        hbox2.addWidget(label3)
        hbox2.addStretch()
        hbox2.addWidget(label4)
        hbox2.addStretch()

        hbox3 = QtWidgets.QHBoxLayout()
        hbox3.addStretch()
        hbox3.addWidget(label5)
        hbox3.addStretch()
        hbox3.addWidget(label6)
        hbox3.addStretch()

        # Set layout
        vbox = QtWidgets.QVBoxLayout()
        vbox.addWidget(self.chart)
        vbox.addLayout(hbox1)
        vbox.addLayout(hbox2)
        vbox.addLayout(hbox3)
        self.setLayout(vbox)

    def update_history(self, history: list):
        """"""
        self.updated = True
        self.chart.update_history(history)

        for ix, bar in enumerate(history):
            self.ix_bar_map[ix] = bar
            self.dt_ix_map[bar.datetime] = ix

            if not self.high_price:
                self.high_price = bar.high_price
                self.low_price = bar.low_price
            else:
                self.high_price = max(self.high_price, bar.high_price)
                self.low_price = min(self.low_price, bar.low_price)

        self.price_range = self.high_price - self.low_price

    def update_trades(self, trades: list):
        """"""
        trade_pairs = generate_trade_pairs(trades)

        candle_plot = self.chart.get_plot("candle")

        scatter_data = []

        y_adjustment = self.price_range * 0.001

        for d in trade_pairs:
            open_ix = self.dt_ix_map[d["open_dt"]]
            close_ix = self.dt_ix_map[d["close_dt"]]
            open_price = d["open_price"]
            close_price = d["close_price"]

            # Trade Line
            x = [open_ix, close_ix]
            y = [open_price, close_price]

            if d["direction"] == Direction.LONG and close_price >= open_price:
                color = "r"
            elif d["direction"] == Direction.SHORT and close_price <= open_price:
                color = "r"
            else:
                color = "g"

            pen = pg.mkPen(color, width=1.5, style=QtCore.Qt.DashLine)
            item = pg.PlotCurveItem(x, y, pen=pen)

            self.items.append(item)
            candle_plot.addItem(item)

            # Trade Scatter
            open_bar = self.ix_bar_map[open_ix]
            close_bar = self.ix_bar_map[close_ix]

            if d["direction"] == Direction.LONG:
                scatter_color = "yellow"
                open_symbol = "t1"
                close_symbol = "t"
                open_side = 1
                close_side = -1
                open_y = open_bar.low_price
                close_y = close_bar.high_price
            else:
                scatter_color = "magenta"
                open_symbol = "t"
                close_symbol = "t1"
                open_side = -1
                close_side = 1
                open_y = open_bar.high_price
                close_y = close_bar.low_price

            pen = pg.mkPen(QtGui.QColor(scatter_color))
            brush = pg.mkBrush(QtGui.QColor(scatter_color))
            size = 10

            open_scatter = {
                "pos": (open_ix, open_y - open_side * y_adjustment),
                "size": size,
                "pen": pen,
                "brush": brush,
                "symbol": open_symbol
            }

            close_scatter = {
                "pos": (close_ix, close_y - close_side * y_adjustment),
                "size": size,
                "pen": pen,
                "brush": brush,
                "symbol": close_symbol
            }

            scatter_data.append(open_scatter)
            scatter_data.append(close_scatter)

            # Trade text
            volume = d["volume"]
            text_color = QtGui.QColor(scatter_color)
            open_text = pg.TextItem(f"[{volume}]", color=text_color, anchor=(0.5, 0.5))
            close_text = pg.TextItem(f"[{volume}]", color=text_color, anchor=(0.5, 0.5))

            open_text.setPos(open_ix, open_y - open_side * y_adjustment * 3)
            close_text.setPos(close_ix, close_y - close_side * y_adjustment * 3)

            self.items.append(open_text)
            self.items.append(close_text)

            candle_plot.addItem(open_text)
            candle_plot.addItem(close_text)

        trade_scatter = pg.ScatterPlotItem(scatter_data)
        self.items.append(trade_scatter)
        candle_plot.addItem(trade_scatter)

    def clear_data(self):
        """"""
        self.updated = False

        candle_plot = self.chart.get_plot("candle")
        for item in self.items:
            candle_plot.removeItem(item)
        self.items.clear()

        self.chart.clear_all()

        self.dt_ix_map.clear()
        self.ix_bar_map.clear()

    def is_updated(self):
        """"""
        return self.updated


def generate_trade_pairs(trades: list) -> list:
    """"""
    long_trades = []
    short_trades = []
    trade_pairs = []

    for trade in trades:
        trade = copy(trade)

        if trade.direction == Direction.LONG:
            same_direction = long_trades
            opposite_direction = short_trades
        else:
            same_direction = short_trades
            opposite_direction = long_trades

        while trade.volume and opposite_direction:
            open_trade = opposite_direction[0]

            close_volume = min(open_trade.volume, trade.volume)
            d = {
                "open_dt": open_trade.datetime,
                "open_price": open_trade.price,
                "close_dt": trade.datetime,
                "close_price": trade.price,
                "direction": open_trade.direction,
                "volume": close_volume,
            }
            trade_pairs.append(d)

            open_trade.volume -= close_volume
            if not open_trade.volume:
                opposite_direction.pop(0)

            trade.volume -= close_volume

        if trade.volume:
            same_direction.append(trade)

    return trade_pairs

5. vnpy/app/chart_wizard/ui/widget.py

from typing import List, Dict, Type

import pyqtgraph as pg

from vnpy.trader.ui import QtGui, QtWidgets, QtCore
from vnpy.trader.object import BarData

from vnpy.event import Event, EventEngine

from .manager import BarManager
from .base import (
    GREY_COLOR, WHITE_COLOR, CURSOR_COLOR, BLACK_COLOR,
    to_int, NORMAL_FONT
)
from .axis import DatetimeAxis
from .item import ChartItem

from vnpy.app.cta_strategy.base import (
    EVENT_CTA_TICK,
    EVENT_CTA_BAR,
    EVENT_CTA_ORDER,
    EVENT_CTA_TRADE,
    EVENT_CTA_HISTORY_BAR
)

pg.setConfigOptions(antialias=True)


class ChartWidget(pg.PlotWidget):
    """"""
    MIN_BAR_COUNT = 100

    def __init__(self, parent: QtWidgets.QWidget = None):
        """"""
        super().__init__(parent)

        self._manager: BarManager = BarManager()

        self._plots: Dict[str, pg.PlotItem] = {}
        self._items: Dict[str, ChartItem] = {}
        self._item_plot_map: Dict[ChartItem, pg.PlotItem] = {}

        self._first_plot: pg.PlotItem = None
        self._cursor: ChartCursor = None

        self._right_ix: int = 0  # Index of most right data
        self._bar_count: int = self.MIN_BAR_COUNT  # Total bar visible in chart

        self._init_ui()

    def _init_ui(self) -> None:
        """"""
        self.setWindowTitle("ChartWidget of vn.py")

        self._layout = pg.GraphicsLayout()
        self._layout.setContentsMargins(10, 10, 10, 10)
        self._layout.setSpacing(0)
        self._layout.setBorder(color=GREY_COLOR, width=0.8)
        self._layout.setZValue(0)
        self.setCentralItem(self._layout)

    def _get_new_x_axis(self):
        return DatetimeAxis(self._manager, orientation='bottom')

    def add_cursor(self) -> None:
        """"""
        if not self._cursor:
            self._cursor = ChartCursor(
                self, self._manager, self._plots, self._item_plot_map)

    def add_plot(
            self,
            plot_name: str,
            minimum_height: int = 80,
            maximum_height: int = None,
            hide_x_axis: bool = False
    ) -> None:
        """
        Add plot area.
        """
        # Create plot object
        plot = pg.PlotItem(axisItems={'bottom': self._get_new_x_axis()})
        plot.setMenuEnabled(False)
        plot.setClipToView(True)
        plot.hideAxis('left')
        plot.showAxis('right')
        plot.setDownsampling(mode='peak')
        plot.setRange(xRange=(0, 1), yRange=(0, 1))
        plot.hideButtons()
        plot.setMinimumHeight(minimum_height)

        if maximum_height:
            plot.setMaximumHeight(maximum_height)

        if hide_x_axis:
            plot.hideAxis("bottom")

        if not self._first_plot:
            self._first_plot = plot

        # Connect view change signal to update y range function
        view = plot.getViewBox()
        view.sigXRangeChanged.connect(self._update_y_range)
        view.setMouseEnabled(x=True, y=False)

        # Set right axis
        right_axis = plot.getAxis('right')
        right_axis.setWidth(60)
        right_axis.tickFont = NORMAL_FONT

        # Connect x-axis link
        if self._plots:
            first_plot = list(self._plots.values())[0]
            plot.setXLink(first_plot)

        # Store plot object in dict
        self._plots[plot_name] = plot

        # Add plot onto the layout
        self._layout.nextRow()
        self._layout.addItem(plot)

    def add_item(
            self,
            item_class: Type[ChartItem],
            item_name: str,
            plot_name: str
    ):
        """
        Add chart item.
        """
        item = item_class(self._manager)
        self._items[item_name] = item

        plot = self._plots.get(plot_name)
        plot.addItem(item)

        self._item_plot_map[item] = plot

    def get_plot(self, plot_name: str) -> pg.PlotItem:
        """
        Get specific plot with its name.
        """
        return self._plots.get(plot_name, None)

    def get_all_plots(self) -> List[pg.PlotItem]:
        """
        Get all plot objects.
        """
        return self._plots.values()

    def clear_all(self) -> None:
        """
        Clear all data.
        """
        self._manager.clear_all()

        for item in self._items.values():
            item.clear_all()

        if self._cursor:
            self._cursor.clear_all()

    def update_history(self, history: List[BarData]) -> None:
        """
        Update a list of bar data.
        """
        self._manager.update_history(history)

        for item in self._items.values():
            item.update_history(history)

        self._update_plot_limits()

        self.move_to_right()

    def update_bar(self, bar: BarData) -> None:
        """
        Update single bar data.
        """
        self._manager.update_bar(bar)

        for item in self._items.values():
            item.update_bar(bar)

        self._update_plot_limits()

        if self._right_ix >= (self._manager.get_count() - self._bar_count / 2):
            self.move_to_right()

    def _update_plot_limits(self) -> None:
        """
        Update the limit of plots.
        """
        for item, plot in self._item_plot_map.items():
            min_value, max_value = item.get_y_range()

            plot.setLimits(
                xMin=-1,
                xMax=self._manager.get_count(),
                yMin=min_value,
                yMax=max_value
            )

    def _update_x_range(self) -> None:
        """
        Update the x-axis range of plots.
        """
        max_ix = self._right_ix
        min_ix = self._right_ix - self._bar_count

        for plot in self._plots.values():
            plot.setRange(xRange=(min_ix, max_ix), padding=0)

    def _update_y_range(self) -> None:
        """
        Update the y-axis range of plots.
        """
        view = self._first_plot.getViewBox()
        view_range = view.viewRange()

        min_ix = max(0, int(view_range[0][0]))
        max_ix = min(self._manager.get_count(), int(view_range[0][1]))

        # Update limit for y-axis
        for item, plot in self._item_plot_map.items():
            y_range = item.get_y_range(min_ix, max_ix)
            plot.setRange(yRange=y_range)

    def paintEvent(self, event: QtGui.QPaintEvent) -> None:
        """
        Reimplement this method of parent to update current max_ix value.
        """
        view = self._first_plot.getViewBox()
        view_range = view.viewRange()
        self._right_ix = max(0, view_range[0][1])

        super().paintEvent(event)

    def keyPressEvent(self, event: QtGui.QKeyEvent) -> None:
        """
        Reimplement this method of parent to move chart horizontally and zoom in/out.
        """
        if event.key() == QtCore.Qt.Key_Left:
            self._on_key_left()
        elif event.key() == QtCore.Qt.Key_Right:
            self._on_key_right()
        elif event.key() == QtCore.Qt.Key_Up:
            self._on_key_up()
        elif event.key() == QtCore.Qt.Key_Down:
            self._on_key_down()

    def wheelEvent(self, event: QtGui.QWheelEvent) -> None:
        """
        Reimplement this method of parent to zoom in/out.
        """
        delta = event.angleDelta()

        if delta.y() > 0:
            self._on_key_up()
        elif delta.y() < 0:
            self._on_key_down()

    def _on_key_left(self) -> None:
        """
        Move chart to left.
        """
        self._right_ix -= 1
        self._right_ix = max(self._right_ix, self._bar_count)

        self._update_x_range()
        self._cursor.move_left()
        self._cursor.update_info()

    def _on_key_right(self) -> None:
        """
        Move chart to right.
        """
        self._right_ix += 1
        self._right_ix = min(self._right_ix, self._manager.get_count())

        self._update_x_range()
        self._cursor.move_right()
        self._cursor.update_info()

    def _on_key_down(self) -> None:
        """
        Zoom out the chart.
        """
        self._bar_count *= 1.2
        self._bar_count = min(int(self._bar_count), self._manager.get_count())

        self._update_x_range()
        self._cursor.update_info()

    def _on_key_up(self) -> None:
        """
        Zoom in the chart.
        """
        self._bar_count /= 1.2
        self._bar_count = max(int(self._bar_count), self.MIN_BAR_COUNT)

        self._update_x_range()
        self._cursor.update_info()

    def move_to_right(self) -> None:
        """
        Move chart to the most right.
        """
        self._right_ix = self._manager.get_count()
        self._update_x_range()
        self._cursor.update_info()


class ChartCursor(QtCore.QObject):
    """"""

    def __init__(
            self,
            widget: ChartWidget,
            manager: BarManager,
            plots: Dict[str, pg.GraphicsObject],
            item_plot_map: Dict[ChartItem, pg.GraphicsObject]
    ):
        """"""
        super().__init__()

        self._widget: ChartWidget = widget
        self._manager: BarManager = manager
        self._plots: Dict[str, pg.GraphicsObject] = plots
        self._item_plot_map: Dict[ChartItem, pg.GraphicsObject] = item_plot_map

        self._x: int = 0
        self._y: int = 0
        self._plot_name: str = ""

        self._init_ui()
        self._connect_signal()

    def _init_ui(self):
        """"""
        self._init_line()
        self._init_label()
        self._init_info()

    def _init_line(self) -> None:
        """
        Create line objects.
        """
        self._v_lines: Dict[str, pg.InfiniteLine] = {}
        self._h_lines: Dict[str, pg.InfiniteLine] = {}
        self._views: Dict[str, pg.ViewBox] = {}

        pen = pg.mkPen(CURSOR_COLOR, style=QtCore.Qt.DashDotLine)

        for plot_name, plot in self._plots.items():
            v_line = pg.InfiniteLine(angle=90, movable=False, pen=pen)
            h_line = pg.InfiniteLine(angle=0, movable=False, pen=pen)
            view = plot.getViewBox()

            for line in [v_line, h_line]:
                line.setZValue(0)
                line.hide()
                view.addItem(line)

            self._v_lines[plot_name] = v_line
            self._h_lines[plot_name] = h_line
            self._views[plot_name] = view

    def _init_label(self) -> None:
        """
        Create label objects on axis.
        """
        self._y_labels: Dict[str, pg.TextItem] = {}
        for plot_name, plot in self._plots.items():
            label = pg.TextItem(
                plot_name, fill=GREY_COLOR, color=WHITE_COLOR)
            label.hide()
            label.setZValue(2)
            label.setFont(NORMAL_FONT)
            plot.addItem(label, ignoreBounds=True)
            self._y_labels[plot_name] = label

        self._x_label: pg.TextItem = pg.TextItem(
            "datetime", fill=GREY_COLOR, color=WHITE_COLOR)
        self._x_label.hide()
        self._x_label.setZValue(2)
        self._x_label.setFont(NORMAL_FONT)
        plot.addItem(self._x_label, ignoreBounds=True)

    def _init_info(self) -> None:
        """
        """
        self._infos: Dict[str, pg.TextItem] = {}
        for plot_name, plot in self._plots.items():
            info = pg.TextItem(
                "info",
                color=CURSOR_COLOR
            )
            info.hide()
            info.setZValue(2)
            info.setFont(NORMAL_FONT)
            plot.addItem(info, ignoreBounds=True)
            self._infos[plot_name] = info

    def _connect_signal(self) -> None:
        """
        Connect mouse move signal to update function.
        """
        self._widget.scene().sigMouseMoved.connect(self._mouse_moved)

    def _mouse_moved(self, evt: tuple) -> None:
        """
        Callback function when mouse is moved.
        """
        if not self._manager.get_count():
            return

        # First get current mouse point
        pos = evt

        for plot_name, view in self._views.items():
            rect = view.sceneBoundingRect()

            if rect.contains(pos):
                mouse_point = view.mapSceneToView(pos)
                self._x = to_int(mouse_point.x())
                self._y = mouse_point.y()
                self._plot_name = plot_name
                break

        # Then update cursor component
        self._update_line()
        self._update_label()
        self.update_info()

    def _update_line(self) -> None:
        """"""
        for v_line in self._v_lines.values():
            v_line.setPos(self._x)
            v_line.show()

        for plot_name, h_line in self._h_lines.items():
            if plot_name == self._plot_name:
                h_line.setPos(self._y)
                h_line.show()
            else:
                h_line.hide()

    def _update_label(self) -> None:
        """"""
        bottom_plot = list(self._plots.values())[-1]
        axis_width = bottom_plot.getAxis("right").width()
        axis_height = bottom_plot.getAxis("bottom").height()
        axis_offset = QtCore.QPointF(axis_width, axis_height)

        bottom_view = list(self._views.values())[-1]
        bottom_right = bottom_view.mapSceneToView(
            bottom_view.sceneBoundingRect().bottomRight() - axis_offset
        )

        for plot_name, label in self._y_labels.items():
            if plot_name == self._plot_name:
                label.setText(str(self._y))
                label.show()
                label.setPos(bottom_right.x(), self._y)
            else:
                label.hide()

        dt = self._manager.get_datetime(self._x)
        if dt:
            self._x_label.setText(dt.strftime("%Y-%m-%d %H:%M:%S"))
            self._x_label.show()
            self._x_label.setPos(self._x, bottom_right.y())
            self._x_label.setAnchor((0, 0))

    def update_info(self) -> None:
        """"""
        buf = {}

        for item, plot in self._item_plot_map.items():
            item_info_text = item.get_info_text(self._x)

            if plot not in buf:
                buf[plot] = item_info_text
            else:
                if item_info_text:
                    buf[plot] += ("\n\n" + item_info_text)

        for plot_name, plot in self._plots.items():
            plot_info_text = buf[plot]
            info = self._infos[plot_name]
            info.setText(plot_info_text)
            info.show()

            view = self._views[plot_name]
            top_left = view.mapSceneToView(view.sceneBoundingRect().topLeft())
            info.setPos(top_left)

    def move_right(self) -> None:
        """
        Move cursor index to right by 1.
        """
        if self._x == self._manager.get_count() - 1:
            return
        self._x += 1

        self._update_after_move()

    def move_left(self) -> None:
        """
        Move cursor index to left by 1.
        """
        if self._x == 0:
            return
        self._x -= 1

        self._update_after_move()

    def _update_after_move(self) -> None:
        """
        Update cursor after moved by left/right.
        """
        bar = self._manager.get_bar(self._x)
        self._y = bar.close_price

        self._update_line()
        self._update_label()

    def clear_all(self) -> None:
        """
        Clear all data.
        """
        self._x = 0
        self._y = 0
        self._plot_name = ""

        for line in list(self._v_lines.values()) + list(self._h_lines.values()):
            line.hide()

        for label in list(self._y_labels.values()) + [self._x_label]:
            label.hide()


class NewChartWidget(ChartWidget):
    """"""
    MIN_BAR_COUNT = 100

    strategy_name: str = ""
    signal_cta_history_bar: QtCore.pyqtSignal = QtCore.pyqtSignal(Event)
    signal_cta_tick: QtCore.pyqtSignal = QtCore.pyqtSignal(Event)
    signal_cta_bar: QtCore.pyqtSignal = QtCore.pyqtSignal(Event)

    def __init__(self, parent: QtWidgets.QWidget = None, event_engine: EventEngine = None, strategy_name: str = ""):
        """"""
        super().__init__(parent)

        self.strategy_name = strategy_name

        self.event_engine = event_engine

        self.last_price_line: pg.InfiniteLine = None

    def register_event(self) -> None:
        """"""
        self.signal_cta_history_bar.connect(self.process_cta_history_bar)
        self.event_engine.register(EVENT_CTA_HISTORY_BAR, self.signal_cta_history_bar.emit)

        self.signal_cta_tick.connect(self.process_tick_event)
        self.event_engine.register(EVENT_CTA_TICK, self.signal_cta_tick.emit)

        self.signal_cta_bar.connect(self.process_cta_bar)
        self.event_engine.register(EVENT_CTA_BAR, self.signal_cta_bar.emit)

    def process_cta_history_bar(self, event: Event) -> None:
        """ 处理历史K线推送 """
        strategy_name, history_bars = event.data
        if strategy_name == self.strategy_name:
            self.update_history(history_bars)

    def process_tick_event(self, event: Event) -> None:
        """ 处理tick数据推送 """
        strategy_name, tick = event.data
        if strategy_name == self.strategy_name:
            if self.last_price_line:
                self.last_price_line.setValue(tick.last_price)

    def process_cta_bar(self, event: Event) -> None:
        """ 处理K线数据推送 """

        strategy_name, bar = event.data
        if strategy_name == self.strategy_name:
            self.update_bar(bar)

    def add_last_price_line(self):
        """"""
        plot = list(self._plots.values())[0]
        color = (255, 255, 0)

        self.last_price_line = pg.InfiniteLine(
            angle=0,
            movable=False,
            label="{value}",
            pen=pg.mkPen(color, width=1, style=QtCore.Qt.DashDotLine),
            labelOpts={
                "color": color,
                "position": 1,
                "anchors": [(1, 1), (1, 1)]
            }
        )
        self.last_price_line.label.setFont(NORMAL_FONT)
        plot.addItem(self.last_price_line)

    def update_history(self, history: List[BarData]) -> None:
        """
        Update a list of bar data.
        """
        self._manager.update_history(history)

        for item in self._items.values():
            item.update_history(history)

        self._update_plot_limits()

        self.move_to_right()

        self.update_last_price_line(history[-1])

    def update_bar(self, bar: BarData) -> None:
        """
        Update single bar data.
        """
        self._manager.update_bar(bar)

        for item in self._items.values():
            item.update_bar(bar)

        self._update_plot_limits()

        if self._right_ix >= (self._manager.get_count() - self._bar_count / 2):
            self.move_to_right()

        self.update_last_price_line(bar)

    def update_last_price_line(self, bar: BarData) -> None:
        """"""
        if self.last_price_line:
            self.last_price_line.setValue(bar.close_price)

特别感谢hxxjava

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感谢分享,精华送上!

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我这个2.5版本怎么没有你这个第四个文件

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houyangyang wrote:

我这个2.5版本怎么没有你这个第四个文件
下载https://github.com/vnpy/vnpy_ctabacktester里面的文件,用vnpy_ctabacktester目录下面的文件替换掉vnpy\app\cta_backtester下面的文件就可以了

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vnpy/app/chart_wizard/ui/widget.py

第5个文件贴错了

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