Very basic, just allows for 3 different moving averages in one indicator. Set the defaults to 50, 100 and 200 day, but numbers and colors can be adjusted to taste. Mashed this together from what I found online for a few people who were interested in having this in a community I belong to. Shout out to the Data Dash community!
plot(AmaOut, color=#ff00ff, title="9 day MA")
plot(BmaOut, color=#4985E7, title="21 day MA")
plot(CmaOut, color=#3FE641, title="50 day MA")
plot(DmaOut, color=#3FE641, title="100 day MA")
plot(EmaOut, color=#3FE641, title="150 day MA")
plot(FmaOut, color=#3FE641, title="200 day MA")
plot(AemaOut, color=#ff00ff, title="9 day EMA")
plot(BemaOut, color=#4985E7, title="21 day EMA")
plot(CemaOut, color=#3FE641, title="50 day EMA")
plot(DemaOut, color=#3FE641, title="100 day EMA")
plot(EemaOut, color=#3FE641, title="150 day EMA")
plot(FemaOut, color=#3FE641, title="200 day EMA")
added three more averages as well as EMA for the same.
study(title="Moving Averages", shorttitle="6MA", overlay=true)
len1 = input(9, title="Length")
len2 = input(21, title="Length")
len3 = input(50, title="Length")
len4 = input(100, title="Length")
len5 = input(150, title="Length")
len6 = input(200, title="Length")
src = input(close, title="Source")
AmaOut = sma(src, len1)
BmaOut = sma(src, len2)
CmaOut = sma(src, len3)
DmaOut = sma(src, len4)
EmaOut = sma(src, len5)
FmaOut = sma(src, len6)
AemaOut = ema(src, len1)
BemaOut = ema(src, len2)
CemaOut = ema(src, len3)
DemaOut = ema(src, len4)
EemaOut = ema(src, len5)
FemaOut = ema(src, len6)
plot(AmaOut, color=#ff00ff, title="9 day MA")
plot(BmaOut, color=#4985E7, title="21 day MA")
plot(CmaOut, color=#3FE641, title="50 day MA")
plot(DmaOut, color=#3FE641, title="100 day MA")
plot(EmaOut, color=#3FE641, title="150 day MA")
plot(FmaOut, color=#3FE641, title="200 day MA")
plot(AemaOut, color=#ff00ff, title="9 day EMA")
plot(BemaOut, color=#4985E7, title="21 day EMA")
plot(CemaOut, color=#3FE641, title="50 day EMA")
plot(DemaOut, color=#3FE641, title="100 day EMA")
plot(EemaOut, color=#3FE641, title="150 day EMA")
plot(FemaOut, color=#3FE641, title="200 day EMA")
hope someone would like this