This is a tweak on my "dozen repeater" system, but played with 3-5 numbers, flatbet.
Trigger: Wait until a dozen repeats. Now bet against the current color pattern formation, in the two unhit columns in that dozen. (The last number hit is the trigger for the bet).
Patterns (dozen repeats)
RR--Bet B
BB--Bet R
RB--Bet B
BR--Bet R
so, for an example dozen 1 repeat with a RR-pattern (3,7) Now all blacks are bet in column 2 & 3: Black 2,8,11 & 6
example 2, RB-pattern hit in dozen 2: (16,20), Now all blacks are bet in column 1 & 3: 15,24 & 13, 22
Progression -none- Flatbet
Bets are placed as long as the repeat continue. (always bet against the curret color-pattern of the last two number that repeated)
A tough session that was won in the end.
Played with 5u bets