study(title="Aroon", shorttitle="Aroon", overlay=false)
length = input(14, minval=1)
upper = 100 * (highestbars(high, length+1) + length)/length
lower = 100 * (lowestbars(low, length+1) + length)/length
plot(upper, color=#FF6A00)
plot(lower, color=#0094FF)