I read many times that roulette has no memory, maybe it’s worth to have a look at the results of a test made on 308’987 spins. You can find precise data of the test made on Lugano Online released directly by the developer Leo Martini Lorenzi. He’s also one of the very few professional roulette players who puts his face for the presentation of his strategy. He also comments the saying: the roulette has no memory.