Roulette is the best-known symbol of casino. Luxury,passion and simple rules make roulette so popular in the world of game. If you translate the word of “Roulette” from French you will get “small wheel”. It was Blaise Pascal who introduced the primitive version of this game in the 17th century. Later the single zero Roulette appeared. It was introduced by Francois and Louis Blanc. The game wasn't then very popular in France as any form of gambling was considered illegal, but Roulette was well-known in Germany and Hamburg. Later Francois and his son Camille were responsible for bringing the game of Roulette back to southern France for the Prince of Monaco, Charles III. At the beginning of the 19th century Roulette appeared at American casinos and gambling houses. Some additional features were deleted and the game got a double zero back. The game of Roulette attracted a lot of American gamblers.

The Martingale is the best-known roulette betting system. There are a lot of variations of it. You should follow such principle: if you win, then pocket your bet. If you lose, you should double your previous bet.By doing this in case you win, you get back your previous loss and one more unit.And so on.
The Martingale System works great only in case you have an infinite bankroll and no betting limits.
The d'Alembert system is also rather popular. This system assumes that after a win, a player is less likely to win again.So after a win, you subtract a chip from your bet. The d'Alembert system also assumes that you are less likely to lose after a losing spin, so in that case, you add a chip to your bet. The fact that the roulette wheel has no memory and each spin is an independent trial with exactly the same odds of a win or loss is the previous spin is a weak point of the system.