//@version=3
study(title="Moving Average", shorttitle="MA", overlay=true)
len50 = input(50, minval=1, title="Length")
src50 = input(close, title="Source")
out50 = sma(src50, len50)
plot(out50, color=fuchsia, linewidth=2, title="MA")

len100 = input(100, minval=1, title="Length")
src100 = input(close, title="Source")
out100 = sma(src100, len100)
plot(out100, color=lime, linewidth=2, title="")

len200 = input(200, minval=1, title="Length")
src200 = input(close, title="Source")
out200 = sma(src200, len200)
plot(out200, color=white, linewidth=2, title="")