GTM - Team signal Buy/Sell

study(title="GTM - Team signal Buy/Sell", shorttitle="GTM - Team signal Buy/Sell", overlay=true)
len = input(10, minval=1, title="Length")
src = input(close, title="Source")
out = ema(src, len)

bearish = cross(close,out) == 1 and close[1] > close
bullish = cross(close,out) == 1 and close[1] < close

plotshape(bearish, color=red, style=shape.arrowdown, text="Sell", location=location.abovebar)
plotshape(bullish, color=green, style=shape.arrowup, text="Buy", location=location.belowbar)