We are going to remind you that negative betting progressions (for example, the Martingale system) are based on an increase in the bet size after a loss. On the contrast, some systems are based on the reduction of bet sizes after a win. As you can see, these two approaches do not contradict each other. That is why strategies that combine them have appeared. A striking example of this kind of betting systems is the d'Alembert system that is famous among those who enjoy playing roulette and other casino games.
The main idea of this strategy is to change the bet, depending on the outcome of the previous spin. If you win, you need to reduce the bet size. If you lose, it is necessary to increase it. This system is usually used by novice gamblers while playing roulette making even money bets. This game does not start with the lowest bets, which are doubled while losing and reduced by half while winning. However depending on the game, the amount of either increase or decrease may vary.
It is believed that such an approach makes it possible to keep the amount of losses to a minimum and ensures fairly regular winnings.
However you should be prepared for periodic losses. If a series of losses is too long, you will reach the upper limit earlier than while following the Martingale strategy, since you have started to play not from the lowest possible bet. This is a great steady system in which wins and losses alternate between each other. In this case, you will win. If the outcomes are repeated (for example, the appearance of the same color several times), you will quickly lose your bankroll.
Moreover, like in any other betting system, the sequence is important in the d'Alembert strategy. If your nerves are on edge after a few losses in a row and you start making the initial bet, its sense will be lost. It is up to you to decide whether this strategy is suitable for you or not.
By the way, there is a system that is an antithesis of the d'Alembert strategy. It is referred to as Contra D'Alembert. According to it, it is necessary to increase the bet by one unit after each win and decrease it by one chip after each loss. Thus, you should play until you reach the established amount. Then you should start making the initial bet. This system is suitable for those who do not want to increase bets significantly after a loss.
To sum up, we want to emphasize once again that the appearance of each number on the roulette wheel is not related to the previous number, so that the efficiency of systems based on this approach is very conditional. Moreover, they will never protect you from losses, except for the cases when you are able to use some misunderstanding in the rules. However if you regularly play games of chance, you need to be aware of the different systems to make bets systematically without counting only on your luck.