The real trick to roulette is to get lucky, then quit while you're ahead. Every spin has a 1 in 37 (for European) or 1 in 38 (for American) chance of landing in a given pocket.

There is no such think as a 100% roulette strategy. It's only an illusion. People think because they can cover 80 - 90% of the board and show small profit compared to amount they wager that they figured out a system. But guess what even know your odds are greater to win at beginning of every spin.