PowerTrends

study(title="PowerTrends", shorttitle="PT", overlay=true)
ema50 = ema(close, 50)
ema7 = ema(close, 7)
ema3 = ema(close, 3)
atrs = (offset(atr(3), 1) / atr(3))
plot(ema50, color=red)
plot(ema7, color=white)
plot(ema3, color=yellow)
buy = (ema3 > ema7 and ema7 > ema50) and (open > close) and (atrs >= 1)
sell = (ema3 < ema7 and ema7 < ema50) and (open < close) and (atrs >= 1)
plotshape(buy, style=shape.arrowup, color=green, location=location.belowbar)
plotshape(sell, style=shape.arrowdown, color=red, location=location.abovebar)