Moving Average Difference

//version=5
indicator("Moving Average Difference", overlay=false)

fastLength = input.int(9, "Fast MA Length")
slowLength = input.int(21, "Slow MA Length")

fastMA = ta.sma(close, fastLength)
slowMA = ta.sma(close, slowLength)

difference = fastMA - slowMA

plot(difference, color = difference >= 0 ? color.green : color.red, linewidth=2)
hline(0, "Zero Line", color=color.white)