Rene, I'm no expert, but I do know that the method you suggested has been tried ad infinitum. The main problem. as I see it is the the risk becomes too high for the reward. Assuming your $100 bet scenario, a winning bet returns a profit of $100. Losses 4 times before winning goes like this: bet 100,lose, bet 200, lose (total lose: 300), bet 400, lose (total lose: 700), bet 800, lose (total lose: 1500), bet 1600, win (total win: 100). The wh0le point is your risking 1600 for a maximum win of $100. Sounds great. If you intend on making a killing you'll have to sit there for many, many hours. However, during such a lengthy period, the probabilities of a much longer losing string becoms great. How about instead of 4 straight loses you have 6 straight loses before a win. Would you want to sit at a table with $3200 riding on red (which isn't even a 50/50 bet) knowing that either you will win $100 or lose $6500. The casinos love these type bettors. I'm not sure, but isn't the limit $5000 on most tables. Remember if you win 7 straight times you win $700. If you lose 7 straight times you lose $12,700. Don't forget table limits.