Playing "column cracker" and noticed how many times a column repeat (hit 2 times) only. Must have happen 80% or 90% of all the repeats. So, therefore, this system takes advantage of this phenomenon.
Trigger: Wait until a column has repeated, now bet the two unhit columns and the 5 unhit doublestreets with 5 quads (repeats in column 1 & 3 is only played).
if a column repeats again (a third repeat) bets are re-placed once again, then STOP. (and wait for a new trigger) Attack is only twice (on the second and third repeat)
so for and example (repeat in column 1) 1,13 are hit. Now quads are placed at 2/6, 8/12, 20/24, 26/30, 32/36.
Next, lets say it repeats again, 34 hits: -Quads are placed: 2/6, 8/12, 14/18, 20/24 and 26/30.
Progression 5 Quad negative progression. 1 2 4 9 21 47 106 238 536
I never went beyond step 4 (9u bet) from my fist test...played with 5u bets