Roulette betting systems take into account that any gambling win can be seen as a mathematical function of probability, the probability of the outcome of a certain event in the game. In roulette it would be the probability of the ball landing on a certain number and colour.
Roulette has a variety of possible wagers that players can make, not just on single colours and numbers, but on a variety of number combinations. Roulette wagering systems are almost as old as the game itself and most are simple to understand and put into practice.
The d’Alembert System
Jean-Baptiste le Rond d’Alembert developed a betting system based on probabilities in the 1700’s. His system is based loosely on the idea that in a coin toss (or certain roulette wagers) you basically have a 50/50 chance of getting one of two results.
You must decrease your wager amount after every win is awarded and then you must increase your wager after any loss, this negating the loss suffered with a higher wager resulting in a win fall pay out.
The Martingale System
The Martingale system is actually a common type of betting strategy that became as famous as the roulette craze in France that inspired it. This system is very much related to the d’Alembert system.
Gamblers double their wager after any loss so when you win, it will leave you with your original stake and a profit. This system also uses the idea of a 50/50 coin toss as its bases.
This system definitely works in theory, but doubling your wager after every loss may soon leave you bankrupt! In theory, you will need an infinite amount of money to successfully keep winning.
The Labouchère System
This betting strategy is called the cancellation system, or sometimes the Split Martingale. You employ this strategy by first writing down the sum you wish to win. Then you break up that sum into a list of numbers that when added up make your desired win total.
Now when play starts you bet an amount equal to the first and last numbers on the list. If you win, cross out those numbers, if you lose, add your loss to the list of numbers.
Sure-fire Roulette strategies are hard to find because there is no precise way to determine the outcome of a random sequence of events. These strategies above are a good starting point to employ a good betting strategy and could well help you improve your chances of winning.