Roulette is one of the hardest games that you can cheat with. It’s not as easy as cheating in blackjack, where you can count the cards yourself. You can cheat at craps if you build up dice control techniques, but how do you cheat at roulette when you have no control of the game events? You can’t touch the ball or the wheel, nor can you influence the game.
One common way is with biased wheels, which requires you to bring in some computer software and record winning numbers over a very long period of time. Nowadays, casinos have the best engineered wheels possible to prevent this and it’s very hard trying to conceal a computer and count numbers for a sufficient period of time.
Another way to cheat is know as Top Hatting. This is a type of collusion between