Martingale strategy is actually a gambling strategy. This method was widely known in Europe shortly after it originated in France in the18th century. Theoretically, this strategy will never lose money. The strategy is very simple, that is, in a big bet or a small bet, you only keep betting on one side (such as a big bet or a small bet). Every time you lose, you multiply the lost money by twice until you win once, so that you can win back all the previous losses and win more money in the first bet.

The advantage and temptation of martingale strategy is that the price doubles after each loss, so the next time you win money, you can always win back all the previous losses. If the first bet is 1 unit principal, then when you lose money continuously, each bet is: 1, 2, 4, 8, 16 ... until you win money. However, this method is definitely not a win, and there is no risk. Its risk is that you may not win a single bet and lose all your money in your pocket. Even if it is a unit bet, when there are a series of losses, the scale of the bet will increase very quickly, and you may go bankrupt before you win the bet.