Oscar's Grind roulette strategy is a method where you increase your bet only after a winning bet, which helps protect your bankroll during losing streaks. You set a target profit and follow a positive progression rule, making profits in betting cycles. It's particularly popular with even chance bets and can be effective in sports betting as well. This strategy is rated 8 out of 10 because it often results in a profit if you're disciplined and it minimizes losses during losing streaks. However, it can be a slow process to reach the target profit, hence the name 'grind'.