Alas, it turns out that the double-down strategy, although deceptively appealing, is no different from other roulette bets: In the long run, the gambler will still lose at the rate ofR$. 053 per dollar bet.

Yes, the Martingale strategy is legal on betting sites. This strategy, which originated in 18th-century France and is commonly used in games of chance that offer a 50/50 bet, involves doubling your bet after each loss so that the first win would recover all previous losses plus win a profit equal to the original stake.

While it is theoretically possible to make a living off of playing roulette, it is extremely difficult and highly unlikely. Roulette is a game of chance, and the house always has an edge, which means that over time, the odds are in favor of the casino.

Say a single-number bet has a 35:1 payout, and you betR$1. If you win, you'll get your money back plusR$35. Another example: If you win aR$100 bet (for a 35:1 payout), you get a total of $3,600 ($3,500 profit plus theR$100 you initially bet).