Roulette strategies are not a guarantee that you’ll win more often. But, they can optimize your returns and minimize losses, provided you’ve picked the right strategy. Most of these systems can be divided into negative and positive progression systems.

For example, the most popular roulette strategy — the Martingale — is a negative progression system which relies on doubling your bets after losses. In that way, it tries to help you recover your losses in a single spin. The Fibonacci and d’Alembert systems use a similar approach. These systems can truly help you win back what you’ve lost in a single try, but their biggest disadvantage is the fact they can be quite costly if a string of losses lasts for a long time.
On the other hand, positive progression systems rely on increasing your bet steadily when you’re on a lucky streak. The problem with these strategies is that you can lose a lot of money on a single spin as you keep increasing it if you’re on a lucky roll.

If you’re riding a good streak, roulette strategies can be helpful. If nothing else, it’s better to play with a plan in mind than just randomly spread cash on the table.