betano empresa wikipedia

Using the dealer's signature\n\n One way of predicting where the ball might land in a game of roulette is to look for the dealer's signature, also known as sector slicing. This theory suggests that the dealer may hit the same numbers more often due to the way in which they spin the wheel.

A roulette game is strictly random and any hope of actually getting an edge at the game died when the new (now relatively old) computers took over the wheels.