this is probably a stupid question,but i know that on the flop the odds on a flush draw are about 4 to 1,on the turn its a little more than 4 to 1,so i assume that you should these odds on each street to decide whether to call or not,but where my confusion comes in,is that i have heard of people using the combined odds for both streets...which is about 2 to 1.i cant really find anywhere that confirms this,but if the odds of the combined draws on both streets are 2 to 1,why wouldnt the 2 to 1 odds be sufficient...or am i missing something altogether.......thanks for any help.