src = market_data_source(timeframe="1H")
short_period = 10
long_period = 50
fast_ema = ema(period=short_period)(src.c)
slow_ema = ema(period=long_period)(src.c)
cross = crossover()(fast_ema.result, slow_ema.result)
trade_signal_executor()(enter_long=cross.result)
