I know the odds against hitting your flush with one card to come is about 4-1, but say I have the nut flush draw off the flop, and theres 40 in the pot, and my only opponent bets 10, i know i'm getting good odds to call, but what if I miss, and i plan on calling on the river? How do the pot odds change. If I call another $10 to see the river, i'll be getting 7-1 from the pot ($60 from last round and another $10 from him this round) in pot, is this right?
That's the most useful way to think about it, since you're making two separate decisions.
Or am I really getting 3-1 here since I bet $20 on the flop and turn to see the next cards. Is this right? ($40 in pot+$20 from him +$20 from me?)
This is also true if you consider both cards together. And in that case we're comparing your 3:1 pot odds to your 2:1 chance of improving in two cards.I say the first is the most useful because you don't know what the price will be on the river when you're considering the flop call, unless of course it's an all-in situation.