D'Alembert betting system

D'Alembert system is called after a 18th century French physician Jean le Rond d'Alembert.  This system is based on the basic belief that in the long run two events of approximately equal probability will happen roughly the same number of times. You must add or subtract the established basic unit to the stake depending on the result of previous event. The stake should be decreasing after the winning bet and increasing after the loosing one.

The difference between D'Alembert and Martingale system is that you do not have to double your betting money in the case of lose - so your stakes do not grow so rapidly.

Example:

• You bet 1 USD and you win (the stake remains the same)
• You bet 1 USD and you lose (the stake increases)
• You bet 2 USD and you lose (the stake increases)
• You bet 3 USD and you lose (the stake increases)
• You bet 4 USD and you win (the stake decreases)
• You bet 3 USD and you lose (the stake increases)

and so on.

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