yeah, estimating EV of a decision that involves multiple streets gets very difficult. i think the trick is to simplify it as much as possible at the expense of accuracy. Im hoping the software I'm looking at can help, but i dont want to say what it is yet because i dont want it to come across as a recommendation if its something i havent tried yet.
I honestly havent done any calculations like that with the EV of a call, but i think you would have to look at approximate equities like for example if we flop a flush draw, we have 9 outs, so roughly 20%
equity to the next street. but then we have to figure out how often our villains bet which would probably require making some big assumptions. i think if villain hits a pair on. a flushdraw board then he would bet 2/3s pot. if the board is dry he probably bets 1/3 pot, and if villain misses he checks. or do we assume villain cbets 100% of the time for simplicity's sake, and does that give up too much accuracy compared to breaking down the various flop textures? then we have to break it down into if we flop a flush draw, if we flop top pair, if we flop top pair + flush draw, and if we flop flush draw + gutter, i think all the other possibilities would be too rare to really consider though. but you can probably see already how we're losing accuracy with every assumption we make, but should still get us fairly close.
