Martingale
The Martingale method is a high-risk strategy that relies on the assumption that a win must come in eventually, which is, of course, not a guarantee. With the Martingale, you double your bet after every loss, so if you bet $1 and lose you then bet $2, and then $4, and so on.
While this strategy can pay off if a win eventually comes, the consistent doubling of your bets mean you could be betting very high very quickly, something few bankrolls can do. That’s why the Martingale is a system that should only used by high rollers who can afford huge losses. Even then, max table limits can put a stop to this strategy.
Paroli
The Paroli System, more commonly known as the Reverse Martingale, is an online roulette strategy that requires players to double their bet after every win. This is a safer strategy for the bankroll, as you’re only raising your bet when you’ve received a payout.
The Paroli System works best if a player has set a number of consecutive wins, and when they hit that number, they walk away from the table. As with all strategies, there are no guarantees here, but the potential for big wins exists.
D’Alembert
The D’Alembert strategy is a non-progressive system of microbets. You choose a set small amount, and you’ll increase the bet by that amount in case of a loss and decrease it by the same amount if a bet is a winner.
This is a relatively safe betting system thanks to the incremental amounts, but like all roulette strategies, it’s important to have a maximum loss amount set and know at what point during a win streak you intend to leave the table.
Fibonacci
The Fibonacci Method involves increasing your bet after every win using the numbers in the Fibonacci sequence. This is a mathematical sequence that adds the previous number to each number so the order goes 1 - 1 - 2 - 3 - 5 - 8 - 13 - 21 - 34 and so on.
The benefits of this strategy are the same as the Paroli system, although bets can get much higher when you get a few steps up the sequence, so, again, it’s important to decide in advance when to walk away from the table.
Labouchere
Also knows as the Split Martingale, Labouchere is a complex, non-progressive system. Players start by choosing how much they want to win, say $10, then split that number into a series of numbers. For example, for $10, you could say 2 – 1 – 1 – 3 – 1 – 2.
When you make your first bet, add the numbers at either side of the sequence, in this example, make a $4 bet. If you win, remove those numbers, if you lose, add the total bet to the end of the list, when all numbers are removed, you’ve made your target.