下面这个class TradeData(BaseData)里面的volume是成功交易的手数吗?
class TradeData(BaseData):
"""
Trade data contains information of a fill of an order. One order
can have several trade fills.
"""
symbol: str
exchange: Exchange
orderid: str
tradeid: str
direction: Direction = None
offset: Offset = Offset.NONE
price: float = 0
volume: float = 0
datetime: datetime = None
def __post_init__(self):
""""""
self.vt_symbol = f"{self.symbol}.{self.exchange.value}"
self.vt_orderid = f"{self.gateway_name}.{self.orderid}"
self.vt_tradeid = f"{self.gateway_name}.{self.tradeid}"