With the Martingale system one attempts to neutralize a loss by putting in a higher amount the next time.

This system can be employed in both sports betting and games of chance. In sports bets you can only put in the amount allowed by the system, whereas in games of chance you must round up or down.

You can use this formula:

your stake = ((potential profit)+(previous losses))//(odds-1)

You can use the following series, for example.

Factor=2/Odds=2 and a potential profit of 1 dollar per winning bet

Bet 1: 1 dollar

Bet 2: 2 dollars (in the case of loss of Bet 1)

Bet 3: 4 dollars (in the case of loss of Bet 2)

Bet 4: 8 dollars (in the case of loss of Bet 3)

Bet 5: 16 dollars (in the case of loss of Bet 4)

Bet 6: 32 dollars (in the case of loss of Bet 5)

Bet 7: 64 dollars (in the case of loss of Bet 6)

Bet 8: 128 dollars (in the case of loss of Bet 7)

And so on.

For every winning bet, you earn a profit of 1 dollar in the previous example.

Factor=3/Odds=3 and a potential profit of 1 dollar per winning bet

Bet 1: 1 dollar

Bet 2: 1 dollar

Bet 3: 1.5 dollars

Bet 4: 2.25 dollars

Bet 5: 3.38 dollars

Bet 6: 5.07 dollars

Bet 7: 7.60 dollars

Bet 8: 11.40 dollars

Bet 9: 17.10 dollars

Bet 10: 25.15 dollars

Bet 11: 37.73 dollars

Bet 12: 57.07 dollars

Bet 13: 85.13 dollars

With every winning bet you earn 1 dollar in the previous example.

Notes:

- A factor or odds of 2 is found when betting on black/red in roulette or on evens/odds or high/low numbers.

- A factor or odds of 3 is found when betting on the first/second/third dozen in roulette or by playing in a row on the right side.

Pros and cons:

The advantage of this system is that you can win back previous losses in a systematic way. The disadvantage is that the amounts you have to put in can quickly escalate, such that you may lose all your profits in one go if your bankroll does not permit such high amounts.
To counter these disadvantages we have developed the Martingale Light system (see further down).