` def on_trade(self, trade: TradeData):
"""
Callback of new trade data update.
"""
msg = ["trade >>> ", trade.datetime, trade.symbol, trade.orderid, trade.tradeid, trade.direction, trade.offset, trade.price, trade.volume]
self.write_log("\t".join([str(x) for x in msg]))
self.write_log(self.bullorder)
self.write_log(self.bearorder)

    # 处理开多
    if trade.direction.value ==  Direction.LONG.value and trade.offset.value == "开":
        self.bullorder["status"] = "POS"
        self.bullorder["trade_time"] = trade.datetime
        # 多单止盈
        self.write_log("=========================================bull止盈================================================")
        self.sell(self.bullorder["takeprofit_price"], 1)
        # 多单止损
        self.write_log("=========================================bull止损================================================")
        self.sell(self.bullorder["stoploss_price"], 1)`

如代码， 在on_trade中挂止盈止损， 但是只有前面的止盈可以委托成功， 止损并未发出， 为啥？
然后再高频中应该怎样现价止损？

您好， 这个问题您解决了吗？

`class FirstStrategy(CtaTemplate):
author = "用Python的交易员"

default_pricetick = 4
default_cancel_order_second = 2
default_stop_pos_second = 40

cancel_order_times = 0


bullorder = {
    "orderid": "",
    "open_price": 0,
    "stoploss_price" : 0,
    "takeprofit_price" : 0,
    "open_time": None,
    "trade_time": None,
    "status": "INIT",
}`

以上代码， 启动多个品种，如图：

运行过程中发现A品种设置的变量值赋值给所以启动的品种， 请问这是怎么回事