change ema21 direction as signal?
I would like to have a buy signal when ema21 change it's direction (stop falling, starts rising). is there any quick way to do it or do I need to access previous day ema21 to compare values if there is a direction change?
I have this but it doesn't work as expected:
ema21 = bt.ind.EMA(period=21) self.ema21up = bt.indicators.UpDay(ema21)