The Martingale strategy in Roulette is a betting system that involves doubling your bet after each loss. The idea is that when you eventually win, you will recover all previous losses plus gain a profit equal to your original bet. Players typically use this strategy on even-money bets, such as red/black or odd/even, where the chances of winning are close to 50%. While the Martingale strategy can seem appealing for recovering losses quickly, it requires a substantial bankroll and is risky due to table limits, which can prevent players from continuing to double their bets during a losing streak.