Good point about the volatility difference.

I guess the reason I found AB a bit sketchy is because of the active float value. One has to discover it for each and every security that's being monitored. I know you generalize it by saying that it can just be the amount of shares exchanged in the past 60 to 90 days, but I found, as did you, that it's not that straightforward. The best way is to simply match reversals in AB to reversals in price, and THAT is tedious process. Unless, of course, there is another tool for that.