MA Posture

A simple script I wrote that allows you to look at the posture of a moving average . Rates of change can be useful to understanding momentum . Additionally, I have included a signal line so you can see if the posture is more or less than average .
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study(title="MA Posture", shorttitle="MAP", overlay= false)
//Get input parameters------------------------------------
len = input(50, minval=1, title="Length")
src = input(close, title="Source")
posture = input(1, minval=1, title = "Look-Back Period")
signal = input(13, minval = 1, title = "Signal length")
//Calculate Posture-------------------------------------
difference = (sma(src,len) - sma(src, len)[iff(posture < len, posture, len)]) / sma(src, len)[iff(posture < len, posture, len)]
//Get a signal
sig = sma(difference, signal)
plot(difference, style = columns, color=blue, transp = 40, title="MAP")
plot(sig, style = line, color = purple, linewidth = 3, transp = 0, title = "signal line")
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