The Martingale system is probably one of the oldest betting systems known to man. The way it works is very simple. Every time you lose you double your bet on the next play. In other words if you bet $1 and lose then the next bet would be $2 and if you lose that you would increase your bet to $4, then $8, $16, $32 etc. until you finally do hit a winner. In theory this is a good betting system except for one thing. If you hit an extended losing streak it could wipe out even a large bankroll for a small net win. If you do plan to play using the Martingale system I would suggest that you set yourself a maximum limit as to how much your willing to wager, before starting over. Or to put it another way you might bet $1 then $2, $4. $8. and maybe make $16 your limit then start over again at $1. By doing this you would decrease your loses if you are on an extended losing cycle. You can use variations of this system. Sometimes if I'm playing a casino game with near even odds like casino war as an example, I'll start my betting with $1 and if I lose that bet I'll increase my next bet to $3 and if I lose that I'll go to $5,then $10 and I'll set my limit at $20. If you follow a system similar to this you'll increase your net win without any change in the basic near even odds of the particular game.