ok here is an updated version of the modified Adaptive ATR from MrTools. The modified version does not "drop" the value of the ATR at the opening of the bar like the original does
and they both are very similar
also as a new feature this version does not trigger high volatility values when there is a gap in the prices. Gaps are a not a sign of high volatility, so it's best to not modify the ATR during those times
cheers
Jeff