Mariner Backtesting - Earnings

 @classmethod
def is_symbol_qualified(cls, symbol, md, service, account):
    EarningsYesterdayAfterGUID = '288d5e0a-9ab2-4e52-9e10-420eaf2adc2b'
    EarningsYesterdayAfter = service.symbol_list.in_list(service.symbol_list.get_handle(EarningsYesterdayAfterGUID),symbol)
    EarningsTodayBeforeGUID = '0774ba76-e53e-4293-9674-489e65c2581b'
    # This combination of service calls returns a 1 if the current symbol is in the specified list, a zero if it is not
    EarningsTodayBefore = service.symbol_list.in_list(service.symbol_list.get_handle(EarningsTodayBeforeGUID),symbol)
    return EarningsYesterdayAfter or EarningsTodayBefore