This is a system that goes by negative progression. It is one of the simplest and oldest betting systems, it is also more commonly known than other systems. The betting system is usually applied to even-money-type bets. You will start by betting one unit, and when you win, you will return to betting one unit. However, should you lose, you will double your bet until you win a hand. Once you have won a bet, you will return to betting one unit. This system guarantees a profit of one unit when you win a bet. This system will always turn a small profit unless you lose an infinite number of times.