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