This is really a noob question but I am kinda confused about the actual laws of the game.
I always thought that the minimum you can raise is double the size of the preceding bet
so for example some guy raises to $10 you would have to raise to $20 minimum then the minimum he can reraise you is $40 etc etc.
But on poker rooms like 888 and others if the blinds are 15/30 your BB, 2 guys limp in then the SB makes it 220 the minimum you should raise with is 440 right? But i looked and the minimum was 390!?!?!
Where does this number come from? and is it different from Post Flop, Flop, Turn and River?
I've also seen someone raise to 60 then get reraised 90 which is just a BB on top.
Can someone explain to me the actual rules regarding this because I'm confused as hell.