HOW TO IMPROVE YOUR ODDS AT ROULETTE. One of the best ways to improve your odds in roulette is by brushing up on your roulette strategy. While the results of each spin are random, roulette strategies can be used to manage your sessions and get the kinds of results you’re looking for. On a single-zero roulette wheel the odds of winning twice in a row on the same number are one in 37 x 37 or once in every 1369 plays! The Roulette Strike Strategy Sets up Jackpot Wins Every 6.4 Plays! The 2/3 Betting System for Roulette Home / Roulette Betting Strategies / The 2/3 Betting System for Roulette 2/3 is a very popular betting system with high winning odds. The basic principle of this betting system is based on the probability theory. Devised by Ian Fleming and used by Britain’s greatest secret agent, this flat roulette betting system covers more than half of the table in bets, basically trying to turn the odds of the game in favour of the player. Of course, in the end, it doesn’t. Another popular strategy is betting on neighbouring numbers. The Martingale roulette strategy has been used by gamblers for centuries. It’s one of the most straightforward strategies you’ll ever come across, but it requires deep pockets to make it work. It works by betting on Red/Black, Odd/Even, 1-18, or 19-36. Every time you lose, you simply double your bet.