Moved to Poker Strategy.

I believe the easiest way is to simply know how the player plays. Tight players will almost never be on a draw unless in a family pot and he can get in for cheap. Loose players will of course often draw to anything including gutshot straights, but usually flush draws seem to be their favourite.

Betting/calling patterns and past history of the loose players can usually tell you most of the information you need to know if they are on a draw or hit. Loose passive's (calling stations) will just check/call down, and you should check or bet/call a tiny bit if they do hit what you think is their draw, loose-aggressive's you just have to bet more if you think they are on a draw. If they just call you and then hit, they seem to almost always either check hoping for a reraise, or else bet a lot. For some reason they don't seem to usually bet an 'enticing' bet. If I'm unfamiliar with the player but know he is loose aggressive, I usually call the enticing bet for both value and to gain information from him in the future.

Originally Posted by Nito

What is a good indication that someone is on a draw?
?

Two things:
1. Texture of the flop. Are there connected (str8) or suited (flush) cards or is the board ragged?
2. Betting - or lack there of. A player just calling along with a textured board indicates a draw although some solid players will bet or raise a 4 flush/4 str8 both to disguise their hand and sweeten the pot on the flop or if in last position to draw a free card on the turn.

Pay attention to the flop texture and the betting habits of your opps and after a few thousand hands, you'll start getting pretty good at reading the opps - hopefully!