Ya, W$WSF is pretty similar to AF. it basically tells you how much they are fighting to win each pot. It gives you a pretty good idea how often they are putting the moves on post flop(and it converges faster than any of those stats individually). I also use it in a similar manner as mentioned earlier instead of W$SD in combination with WTSD.


I use Agg % and AF by street occasionally from popup stats, but they can be kinda tricky w/o a big sample size on the turn & river