Using a system of odd and even numbers in online Roulette can add structure to your betting, but it doesn't change the underlying randomness of the game. A common approach is to alternate or consistently bet on either odd or even numbers, similar to strategies like the Martingale system. After each loss, you can increase your bet size to recover losses, but this comes with risk, as a losing streak can quickly deplete your bankroll. Another tip is to monitor recent outcomes for patterns, though this is more about personal betting style than increasing odds, since each spin remains independent. The key is to manage your bankroll wisely and avoid overextending based on streaks or patterns.