Agreed 100%. On trading view, if you change the values of the SuperTrend to the William's values (66,2.236) You get the same plot.

Shaban 

Larry Williams' WillTrend indicator, though, is not the one pointed out in the first post by: noumann, because this is the indicator (...it resembles a SuperTrend): so the formula could be this: ----------------------------------------------------------------------- {WillTrend - by Larry Williams} Inputs: Period(66), ATRMultiplication(2.236), MidPriceVar(10); Variables: upperBand(0), lowerBand(0), atr(0), trail(0), midPrice1(0), midPrice2(0), midPrice(0); atr = AvgTrueRange(Period) * ATRMultiplication; midPrice1=Lowest(low,MidPriceVar); midPrice2= Highest(high,MidPriceVar); midPrice= (midPrice1 + midPrice2)/2; lowerBand= midPrice + atr; upperBand= midPrice - atr; trail = IFF(Close > trail[1] and Close[1] > trail[1], MaxList(trail[1], upperBand), IFF(Close < trail[1] and Close[1] < trail[1], MinList(trail[1], lowerBand), IFF(Close > trail[1], upperBand, lowerBand))); Plot1(trail); if (Close > trail) then SetPlotColor(1, green) else SetPlotColor(1, red); ------------------------------------------------------------------------

Correction on this it should be HL2 not "(high-low)/2". Therefore:
upperBand = ((high+low)/2 + 2.236) * atr(66)
lowerBand = ((high+low)/2 - 2.236) * atr(66)

Afriend247 

I know this is an old Post, but I have not been able to find an answer here or anywhere. And this post comes up first on my web search. I have the answer. Here it is: upperBand = ((high-low)/2 + 2.236) * atr(66) lowerBand = ((high-low)/2 - 2.236) * atr(66) If your programming language does its math from left you right, you WON'T need the parenthesis.