Martingale is one of a class of betting strategies originating from and popular in 18th century France. The simplest of these strategies is designed for games where the gambler wins the bet if the coin appears head and loses if the coin appears tail. That strategy makes the gambler double his bet after each loss, so the first win will recover all previous losses plus win the same profit as the original stock. The Martingale strategy has also been applied to roulette, because the chance of hitting red or black is approaching 50%.
How it works
Martingale’s basic strategy is to double your bet on defeat and rearrange to win.
As an example:

Beware of martingale, increase the number of bets very quickly and not sure if the next throw will be won, play with a balance that you can beat.