While there are many winning systems sold online that claim to be effective, the truth is that there isn’t much you can do to increase your chances of winning. A Roulette game is a game of luck, i.e. it is a game of random outcomes. To determine the next number, casinos use a Random Number Generator which produces limitless combinations that make predicting numbers entirely impossible. Now, some claim to have a winning system that relies on how much you bet, the most popular example being the Martingale. Basically this system relies on doubling your bet each time you lose, so that when you eventually win you can cover all your losses. However, the system also implies that you should have enough resources to last you until the win, which may not come for a long time. The bottom line is that systems will never help you predict the numbers or alter your odds, but only alter your results. Thus, you should always think twice before investing in a system.