code: def on_bar_min1(self, tiny_bar):
          
          bar = tiny_bar
          symbol = bar.symbol
          price = bar.open
  
          up, down = self.track(symbol)
          now = datetime.datetime.now()
          work_time = now.replace(hour=9, minute=30, second=0)
          if now == work_time:
              self.before_minute_price = price
              return
          if self.before_minute_price == 0:
              self.before_minute_price = price
              return
          if self.before_minute_price < up and price > up:
              self.do_trade(symbol, price, "buy")
          elif self.before_minute_price > down and price < down:
              self.do_trade(symbol, price, "sell")
          self.before_minute_price = price
docs: 每一分钟触发一次回调