The indicator is based on the moving average of the Heiken Ashi candles.
Formulas:
MA1 = MA(HA_Close),
MA2 = MA(MA1),
MA3 = MA(MA2), where
HA_Close[i] = ((Open[i]+High[i]+Low[i]+Close[i])/4+HA_Open[i]+Max(High[i], HA_Open[i])+Min(Low[i], HA_Open[i]))/4,
HA_Open[i] = ((Open[i+1]+High[i+1]+Low[i+1]+Close[i+1])/4+HA_Open[i+1])/2.
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