// Downloaded From https://www.WiseStockTrader.com
Periods = 20;
Width = 2;
WVF = (HHV (Close,22) - Low)/(HHV(Close,22))*100;

sdev= Width*StDev(WVF,20);
midline=MA(WVF,20);
lowerBand = midline - sdev;
upperBand = midline + sdev;
Plot(upperBand,"",colorGrey40,4|styleDashed);
Plot(lowerBand,"",colorGrey40,4|styleDashed);
ph=0.85;
pl=1.01;

rangeHigh = (HHV(wvf, 50)) * ph;
rangeLow = (LLV(wvf, 50)) * pl;

mid=1;
Plot(midline,"",colorGrey40,4|styleDashed);
col = IIf(wvf >= upperBand,ColorRGB(270,0,150),IIf(wvf<=lowerBand,colorBlue,colorlightgrey));
Plot(WVF,"William VIX FIX", col,4|styleHistogram|styleOwnScale);