Reverse Martingale, also known as the Paroli system, is a betting strategy in which players increase their bets after a win and decrease their bets after a loss. This is the opposite of the Martingale system, where players increase their bets after a loss. For example, if you start with a $10 bet and win, then you increase your bet to $20 on the next round. If you win again, you up it to $40, and so on. If you lose, then you return to your original $10 bet.