Betting Structure for 5 Card Draw
There are two possible betting rounds in a complete game of 5 Card Draw. Each bet and raise during the first round of betting is set at the lower limit of the stakes structure. For example in a $4/$8 game, all bets and raises are $4 for the first round. After the first betting round each player may discard and draw from zero to five cards.
Each bet and raise during the final round of betting is set at the higher limit of the stakes structure. For example in a $4/$8 game, all bets and raises are $8 for the last round.
The maximum allowable number of bets per player during any particular betting round is four. This would consist of (1) a bet, (2) a raise, (3) a re-raise, and (4) a cap. The term cap is used to describe the 3rd raise in a round since betting is then capped and can not be raised anymore. Once the pot is capped, players will have only the option of calling or folding.
Button & Blinds
As with Hold'em and Omaha games, a flat disk is used at the 5 Card Draw table, called the dealer-button to indicate the theoretical dealer of each hand.
After each hand has completed the button moves clockwise to the next active player. This player will be considered to be playing "the button" for that hand. The player to the left of the button is first to receive a card and is required to post a small blind. The small blind is equal to half the lower limit bet rounded down to the nearest dollar. The player to the left of the small blind is required to post the big blind, equal to the lower limit bet. These blind structure rules are the same as found in brick & mortar cardrooms.
Both blinds are considered live bets, therefore have the option of checking, calling, raising or folding when the betting action returns to their position. After the flop and each subsequent betting round, the first active player left of the button is first to act.
When a player first sits at an active table they'll be required to post the equivalent of the big blind, an important feature of online poker. All players have the option of sitting out and waiting for the actual big blind before starting to play. Fairness is ensured to all players with these rules. By preventing players from constantly entering games in late position and leaving before they're required to post, these rules stop potential abuse of the online environment.