class OrderData(BaseData):
"""
Order data contains information for tracking lastest status
of a specific order.
"""
symbol: str
exchange: Exchange
orderid: str
type: OrderType = OrderType.LIMIT
direction: Direction = None
offset: Offset = Offset.NONE
price: float = 0
volume: float = 0
traded: float = 0
status: Status = Status.SUBMITTING
datetime: datetime = None
reference: str = ""
拒单的理由是存在这个reference里吗?