Omaha is considered, by some, to be the hardest game of Poker to master. Of all of the different games of Poker, Omaha is for many the hardest to learn to play and the hardest to bluff in. It is played most often at fixed limits, like Texas Hold'em and pot limit.
There is no one algorithm. The game is a combination of luck and skill. It also has factors such as the number of players in a hand, and where your seating position is relative to the dealer.