Headley Accelaration Bands

# Price Headley Accelaration Bands
# Assembled by BenTen at useThinkScript.com
# Converted from https://www.tradingview.com/script/wM2yTTOq-Indicator-Price-Headley-Accelaration-Bands-LazyBear/

input length = 20;
def ub = (high * (1 + 2 * ((((high - low) / ((high + low) / 2)) * 1000) * 0.001)));
def su = simpleMovingAvg(ub, length);
def lb = (low * (1 - 2 * ((((high - low) / ((high + low) / 2)) * 1000) * 0.001)));
def sl = simpleMovingAvg(lb, length);

plot u = su;
plot l = sl;

addCloud(u, l, color.lime, color.lime);

u.SetDefaultColor(GetColor(1));
l.SetDefaultColor(GetColor(0));