In general, if the flop was no raises, then Expected to sweat will always be insufficient to attempt to create "holes" Street. The only exception - the situation where many players on the flop announce call. As an example, consider the game to betting $ 10 - $ 20, where the flop prokollili five players - and eventually the sweat was $ 50. If one of the opponents announces bet, and two others - call, then you may want to prokollit. In this situation, your Expected to sweat is 8 to 1, and in the case of improving your hand, with so many players in the hand you can get additional beta. However, in most distributions in the Internet still need a raise on the flop to call was justified, because online games are usually not so loose.
When you decide to try to make a draw with "holey" Straight, you need to know for sure that none of the opponents after you makes a pot raise. It is acceptable to pay $ 10 to win $ 110, but if someone will announce a raise, you will have to pay $ 20 to win the 140, that is, in this case your sweat Expected to be only 7 to 1. The best situation for playing the "leaky" straights develops when your call ends bidding.
When the flop comes two cards of the same suit, you almost always should fold - except when the pot is very large. Do you still only three outs instead of four, so the expectation is only 15 to 1. Even if the turn you will improve your hand, you will still have to worry about what the opponent on the river can make a flush or even more powerful combination.
"Inside" Street with only one pocket card - this is a very weak draw. Sometimes you can lose more severe Street, in addition, it is likely that you will have to share the pot with someone from the opponents. Moreover, while improving your hand will be very difficult to get more Betov, because at such a frightening opponents of the board will be very inactive bet. For example, pocket 6-2 when the board of T-8-7 - this is a very weak hand. If he comes nine, then you will be formed straight, but you lose an opponent with pocket jacks, and you have to divide the pot with any player who has 6. With Pocket J-6 you have, at least, it would draw up a strong straight (although you still might lose QJ); but with this board, you will still be difficult to get a lot of Betov from opponents. It would be valuable for playing the "leaky" straights provide additional beta, which you expect to get on the turn and river. Since using only one hole card to get these betas is difficult, usually with a hand should be declared fold, unless you do not have extra outs - for overcards or couples.