RTP

In the roulette game the martingale strategy is to bet on even money bets and if you loose you double the bet for next round until winning. The “logics” behind the strategy is that the player should eventually win - no matter how long the loosing streak is. And when he does he has an advantage over the casino of 1 original bet.

Although I am sure you know what return to the player (RTP) is I will repeat the definition so we are on the same page.

Return to the player (RTP) definition

The RTP is the percentage of the players bet that is returned to the player through game wins.

If for every 100 cents bet the player wins back 90 cents on average this means the game has RTP of 90%. It is important to note that the RTP is considered for every bet made not for money brought to the machine.