def load_tick(self, days: int):
    '\n        Load historical tick data for initializing strategy.\n        '
    self.cta_engine.load_tick(self.vt_symbol, days, self.on_tick)
Load historical tick data for initializing strategy.
def load_tick(self, days: int):
    '\n        \n        '
    self.cta_engine.load_tick(self.vt_symbol, days, self.on_tick)