”Martingale” is the most common Roulette system. This system is very good for the inexperienced players, and has an infallible logic. Start betting with one unit, if you win take the winnings but leave the original bet. If you loose you must double the bet until you win.
a) You must take care with the 0, and the 00, there is no true even money bet in Roulette.
b) Table limits ruins the system, you only ever win 1 unit.
If you bet 10, 20, 40, 80, and 160, you can win $320 on the final bet. But how much did you really win? Reduce $150 (if you sum up the previous losing bets), and $160 (you place on the current bet) equaling $310. Congratulations!!! you have won $10. but you mustn't lose your smile, because you would have lost far more if you hit the table limit!