Before you can make a decision on any casino betting strategy you should know your bankroll. While betting large amounts can bring you large wins, doing so may also result in losing your entire credit. The Martingale strategy involves placing twice as many wagers after losing. This strategy will allow you to recover your losses, and even make profits. It can be used with blackjack or roulette. It is designed to ensure that you don\’t run out of credit or money before the game ends.