The Martingale Strategy is arguably the best roulette strategy, and it's certainly one of the most famous ones. Simply put, you don't hold back when you lose; you do the opposite. Whenever you lose in roulette, the Martingale Strategy requires you to make your bet bigger than the previous one.
Some of these numbers include:
17: This number is considered to be the most popular number in roulette, as it is believed to have brought luck to many players in the past. ...
7: Seven is often considered a lucky number in many cultures, and is therefore a popular choice for roulette players.