DIFFERENTIAL BETTING
DIFFERENTIAL BETTING, PART 1
WITH A MODIFICATION OF THE CONTRE D`ALEMBERT PROGRESSION
Systems using flat bets generally contain long lasting stagnation
phases, which make a strategic play uneconomic: expenditure of
time and the yield are in no profitable relation to each other.
Based on this realization and the fact that even money chances
are ruled by both the law of deviation (ECART) and the law of
balance (EQUILIBRIUM), it is quite possible to utilize the strategy
of differential betting
Differential betting is not a bet selection or a progression, because
it can be used only if two chances are attacked at the same time.
Differential betting can never be accomplished with flat bets,
since all bets would be zero!
The differential betting is only possible if two chances (for example RED / BLACK) are followed with a progression. Here for each chance the respective
progression bet size is determined separately, however only the difference
is wagered.
The Contra D’Alembert Progression
The original D’Alembert Progression is a negative or "up as you lose"
progression. Starting always with a bet size of 1 unit, the bets are raised
after each loss by 1 unit and lowered by 1 unit after a win.
The Contra D’Alembert Progression is a reverse of the original or "up as you
win" progression.
The first bet of the progression is also 1 unit. After a win the bet is raised
1 unit and after a loss the bet is lowered 1 unit.
In the following example we bet for ease of demonstration on EVEN numbers:

Using the Contra D’Alembert progression the spin run above
would produce a total loss of 7 units within 14 spins.
In permanence sections where the deviation dominates,
the Contra D’Alembert produces gains very fast, but the
progression loses 1/2 unit per placed bet if the permanence
balances itself out.
The same spin run using differential betting:
· EU: units on EVEN
· BE: balance EVEN
· OU: units on ODD
· BO: balance ODD
· TB: total balance

The result of -4 is slightly better than the first result, however is not very satisfying. Using a modification after a lost bet shows better results. The modification is simply to reset to a bet size of 1 unit after a loss. See next table:

The spin run is balanced (7 even numbers and 7 odd numbers). The result is neutral.
Now let us take a look at a spin run with a stronger deviation towards one chance.
Here we use the chances BLACK and RED:

Since we do not know on which chance the deviation will occur,
differential betting is obviously a good strategy to achieve gains
be it a deviation towards BLACK or be it a deviation towards RED.
The BLACK side loses 19 units and the RED side wins 29 units.
Net gain 10 units with the highest downswing of 5 units if you look
at the Total balance. Seems to be not too dangerous.
Almost every progression (negative or positive) is usable for differential betting.
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