"Deviation" is a slot strategy that uses a mathematically advanced equation. You decide on the best winning chances with the equation. You need to be patient, have focus, and be ready to spend your bankroll to get a guaranteed return.  Use a slot machine that has equal pay. This means the machine receives a value related to the coins that you bet on a pay line. For instance, you wager a 2 coin you get 20 coins in return and for 4 coins you get 40 coins.
Play at a slot machine continuously until you have won for at least two or three times and count the spins it takes to reach a win. If the standard spins are a minimum of 10 between wins, you have the spin average that you can use when you are at a slot machine with high pay outs.