There are countless roulette betting systems out there, and for some reason, the majority of players who use them choose the negative-progression variety.

Negative progression systems in betting mean that you bet more when you’re losing and less when you’re winning. The theory is that in a long-run trial of betting outcomes, the expected deviation from win percentage will not be excessive, leaving your winnings ahead of your losses.

Betting systems overall are generally used in roulette, but can theoretically be used with any type of wager. Any bet with a roughly 50/50 chance to win is usually a good option. If you want to know more about betting progressions and the differences between negative and positive ones, check out this article.

In this article, we'll take a more analytical look at negative progression systems specifically, outlining their main advantages and pitfalls through an example.