Consider these 3 groups/pairs
RED DOZEN 1<>BLACK DOZEN 1
RED DOZEN 2<>BLACK DOZEN 2
RED DOZEN 3<>BLACK DOZEN 3
Procedure: Wait until one group hits 3 times, without the other group being hit. Now you bet the unhit group (6 numbers bet) ALSO bet 6u on each of the two unbet dozens.
For an example RED DOZ 1 has hit total of 3 times;--Now you bet all 6 BLACK numbers in DOZ 1. ALSO you bet 6u on DOZ 2 and DOZ 3.
Progression: double bets for each loss
Bank: A minimum of 200u, (recommended 1000u)
First tests was played with 1u bets (wingoal +200u, stoploss -200u)
8/10 Games won (playing with a 200u stoploss)
10/10 Games won playing with a higher stoploss, (i would recommend 1000u to be "safe" i doubt it will ever/or in very rare EXTREME cases reach 1000u)
calculating win losses (playing with a 200u stoploss)
losses: 200*2= -400u
wins: 200*8= +1600u