The D'Alembert Roulette system is perhaps not as well known as the MartinGale/Labouchere Roulette systems. Out of all the Roulette strategy systems, D'Alembert is perhaps the most simple and basic to implement. Like the other Roulette strategy systems it only allows for betting on red/black or odd/even.
D'Alembert system dictates reducing your bet size after a win and increasing your bet after a loss. The important thing to remember regarding this Roulette strategy is to GRADUALLY increase/decrease your bet size one chip at a time. For example if you bet $5 and lose, increase the wager to $6 for the next spin. If you win reduce your $5 bet to $4.
This is a clever Roulette strategy but needs a lot of patience and self control to fully implement. It will not guarantee that you defeat the casino game but will higher your chances dramatically compared to using no Roulette strategy at all. I would recommend perfecting this strategy at an online casino first before playing at a live casino.