D’Alembert Roulette Strategy

Expert roulette gamblers have long used various betting strategies to increase their chances of winning and ultimately manage their bankroll on the tables. The D'Alembert roulette strategy is one of the most popular systems used by players. It's a negative progression strategy like Martingale or Fibonacci. Still, unlike the two, D'Alembert is not sophisticated or complex to use, meaning you can easily adapt it to your roulette real money gameplay. Basically, when you employ the D'Alembert roulette strategy, you increase your bet size by a unit after a loss and reduce it by a unit after a win. The sections below shed more light on the betting system.

About the D’Alembert roulette strategy

The D’Alembert roulette system is also known as the Montant Et Demontant, meaning upwards and downwards. Since this is more like a pyramid combination, it is basically based on a mathematically balanced hypothesis. This system was created by Jean-Baptiste le Rond d’Alembert, a famous 18th-century French physicist, philosopher, and mathematician.

The mathematician had pioneered several other theories, and although he never implemented them into gambling, players, seeing the potential of his ideas, integrated his principles into casino gambling, leading to the birth of the D’Alembert roulette system.

The operating principles of the D’Alembert betting strategy are straightforward: Lower your bet size by a unit after a win and increase your bet amount by a unit after a loss. The goal here is to ultimately balance off the wins and losses during gameplay to make a net profit.

Players using this betting system usually bet on roulette bets with a near 50/50 success chance for the best results. This means that you should use the D’Alembert roulette system on the high/low, red/black, and even/odd outside bets. Over time, players have also adjusted this strategy, creating a reverse D’Alembert strategy. We’ll look at this later in this review.

Understanding the D’Alembert roulette strategy

There are positive progression and negative progression betting systems in the roulette gambling universe. The D’Alembert system falls under the latter, along with other popular systems like Martingale, Fibonacci, and Labouchere, where players reduce their bets after a win and increase them after a loss.

However, unlike the mentioned systems, D’Alembert is less aggressive since you don’t exhaust your bankroll as rapidly as you would with the others in case of a long losing streak. The former betting systems are quite the opposite: You increase your bet sizes after a win and lower your bet amounts after a loss. These are the key points to remember when using the D’Alembert roulette strategy:

  • According to the betting system, the number of wins and losses should theoretically break even over an extended gambling session that eventually results in a net profit.
  • Place even-money bets in roulette that pay 1:1 when using this strategy. Placing other bets like straight-up or streets will bring undesired results (massive losses since they don’t have a near 50/50 probability of winning).
  • Prior to adopting the D’Alembert betting strategy, decide on a bet unit since you increase or decrease your bet amount in each round by this unit. So, the unit can be $0.10, $0.50, $1, $2, $5, $10, or more, depending on your bankroll balance.

The players who want to keep the number of their bets and losses to a minimum favour this method.

How the D’Alembert roulette system works

As we’ve reiterated on this page, the simpleness of the betting is as follows: One unit is added to the next bet after each loss and one unit is deducted from the next bet after each win. The idea of this betting structure is that players will be able to recoup their losses after landing wins during their gambling session. Consider the example of the below betting session where a player starts with a bet unit of $5.

Bet size and outcome in each round:

  • Round 1: $5 (L)
  • Round 2: $10 (L)
  • Round 3: $15 (L)
  • Round 4: $20 (W)
  • Round 5: $15 (W)
  • Round 6: $10 (L)
  • Round 7: $15 (W)
  • Round 8: $10 (W)

From the above example, after losses in rounds 1, 2, 3, and 6, the player increased the bet sizes by a unit ($5) in the following rounds. However, they reduced their bet amounts by a unit in the subsequent spins after wins in rounds 4, 5, 7, and 8. So, assuming the player started with a bankroll balance of $100, this is how their balance will change in the course of the eight rounds:

  • Round 1: $95
  • Round 2: $85
  • Round 3: $70
  • Round 4: $90
  • Round 5: $105
  • Round 6: $95
  • Round 7: $110
  • Round 8: $120

If the player decides to end their roulette gaming session at this point, they’ll end up with a $120 balance, meaning they made a net profit of $20. Nevertheless, please note that the above is just an example, and your session may turn out differently. If you win on your first spin, your next spin should remain the same. Your betting will not be reduced since you’re at your starting point. In fact, the D’Alembert roulette system upwards and downwards sequence commences after your first loss.

Reverse D’Alembert roulette strategy

As you’ve already deduced, the reverse D’Alembert betting system is the opposite of the original. Therefore, instead of increasing your bet when you lose, you increase it after a win. Consequently, you also lower your bet size after losing. Other than this adjustment, the betting system follows the same principles: Playing with even-money roulette bets, selecting a unit of bet before commencing, and only increasing or lowering bets by a unit, depending on the outcome. This is how the above gaming session would look under the reverse D’Alembert betting system:

  • Round 1: $5 (W)
  • Round 2: $10 (W)
  • Round 3: $15 (W)
  • Round 4: $20 (L)
  • Round 5: $15 (L)
  • Round 6: $10 (W)
  • Round 7: $15 (L)
  • Round 8: $10 (L)

Pros of using the D’Alembert roulette strategy

One of the advantages of this betting system is that it’s very easy to use, and mostly you don’t need a pen and paper to do calculations. Still, it’d be wise to keep track of your D’Alembert betting strategy to measure its effectiveness.

The system’s betting progression structure can instil discipline in a player’s betting routine, enabling them to make wise betting decisions and better manage their bankroll. Also, D’Alembert’s betting system (raising bets after losses and reducing them after wins) allows players to minimise their losses and increase profits.

Compared to other strategies like Martingale, losing streaks in the D’Alembert roulette system cannot bring about outrageous losses since you increase bets by a unit after losses vis-à-vis doubling your bet amount after a loss in the Martingale roulette system.

Cons of using the D’Alembert roulette strategy

This strategy offers no guarantee of success, just like other roulette betting strategies. It cannot curb or influence the house edge to your advantage. So, it’s critical that you treat it as a bankroll management system that may occasionally bring you a net profit.

Since it’s a less aggressive negative progression strategy (where increments after losses are only by a unit), some players may not like it because profits may accumulate slowly. Also, although it’s less aggressive, you may need a somewhat considerable balance to use this strategy to cover for the extended losing streaks that may occur during real-money gameplay.

D’Alembert roulette strategy tips

In addition to using this strategy, below are a few tips that may help you enjoy longer betting sessions and exploit the full potential of the D’Alembert roulette system:

  • Besides playing at reputable and licenced roulette online casinos, you can select tables with low betting limits. This allows you to set a lower bet unit when using the D’Alembert betting strategy, thus enabling longer gambling sessions without depleting your balance rapidly.
  • Incorporate betting limits into your gameplay. This allows you to stop gambling when you’ve reached your preferred loss, win, or wager limits, leading to responsible gambling.
  • You can test the D’Alembert betting system in demo mode before venturing into real money gambling. That way, you’ll experience the effectiveness of this betting approach without any risks and decide if it matches your style of play.
  • Also, it goes without saying that playing European and French roulette games is a smart move since they have a slightly higher chance of winning on the even-money bets as opposed to American roulette due to the extra’ 00′ pocket.
  • Use the D’Alembert roulette strategy when betting only on low/high, even/odd, and black/red bets.
  • You can claim roulette bonuses to use in the game with this system for extra entertainment. However, read the attached bonus terms carefully before claiming and using a bonus.


If you’re looking for a negative progression betting system that’s less aggressive than Martingale or Fibonacci, the D’Alembert strategy is your best bet. Many players favour this betting approach since it helps minimise their losses and is easy to use and learn. The key thing to remember when using the D’Alembert roulette strategy is to choose your bet unit, increase your bet by a unit after a loss, and lower it by a unit after a win. If you fancy a different approach, you can employ the reverse D’Alembert betting system to see which one works best for you. Our D’Alembert strategy tips will help you smoothly integrate this betting approach into your gameplay.