I've divided the numbers in equal distribution (among the dozens) 3 in each. This is a nine numbers bet.
These Red & Black groups are:
RED GROUPS
A: 5 7 12 14 19 21 25 27 36
B: 1 3 9 16 18 23 30 32 34
BLACK GROUPS
A: 2 4 11 15 20 22 28 33 35
B: 6 8 10 13 17 24 26 29 31
I tested different triggers, but this one seems to work the best:
Trigger: Whenever one group of R/B hits, bet the other group of same color for 3 spins.
Progression: Cyclic 3 step progression, after 3 losses +1 bet, after one win (within 3 spins) -1 bet
test-session (RNG):
WLLWWWLWLLWLLLWLLLWWLLWLW : 11/25= 44% hitrate
Expected hitrate for 9 numbers: 9/37= 24%
My first Live-session @castle casino:
LWWLWLLLLLLLLWLWLLLWLLLLWLLW : Hitrate 8/28= 29%
(Expected hitrate for 9 numbers 9/37=24%)
Progression & trigger works fine.
i have been testing my own system which is fairly similar to this but not quite, so far tested over 3000 live spins, consistent Hit rate of 28 to 29% over these 3000 spins, longest losing streak encountered so far is 16 which recovers all with just flatbetting, i would stick along these lines Ignatus there maybe something more here, another example of a good strategy being dismissed, i have not tested your way yet
I have a different trigger/progression+stoploss for this one now. (trigger can be played also; wait unti 3 groups have been hit, 4 spins, then bet for the fourth,... etc)
RED GROUPS
A: 5 7 12 14 19 21 25 27 36
B: 1 3 9 16 18 23 30 32 34
BLACK GROUPS
A: 2 4 11 15 20 22 28 33 35
B: 6 8 10 13 17 24 26 29 31
Trigger: Wait until 3 groups have been hit,
then bet for the 4:th group.
Progression. 1-1-1-2-2 STOP
only 5 bets, since most hits seems to come
within 5 spins.
If loss: Accept the loss (Progression Reset).
Bet for a new group
Progression Reset.
Test-RNG
LLW
LW
LLLLw
LLW
LLW
LW
LLLLW
LLLW
LW
LW
W
W
W
LLLW
W
LLLLLLLLLLLLW