Gamblers have been looking for a betting system that works for hundreds of years, and yet the casinos are still standing. However, in all things, the more ridiculous a belief is the more tenaciously it tends to be held. In the many years that run this site, I have received thousands of e-mails from believers in betting systems. The longer you play, the ratio of money lost to money bet will get closer to the expectation for that game.
However, in the long run no betting system can withstand the test of time. In the short run, you can fool yourself into thinking a betting system works, by risking a lot to win a little.
Every spin in roulette and every toss in craps is independent of all past events. Roulette balls and dice simply have no memory.
Not only do betting systems fail to beat casino games with a house advantage, they can’t even dent it. On this page The Truth about Betting Systems Introduction