this seems to work from a first test;
trigger: for each dozen hit, bet the opposite color (6 numbers, straight up) in that particular dozen hit.
progression, after 18 chips are placed (after 3 doz hit) double bets, after that double for each spin until hit.
if same doz hit, double after 3 spins for 1 doz, 3 spins for two dozen, etc...
i've made a video;
link:s://youtu.be/BeVtrRv8VMg
more spins...
Martingale is never a good idea, i should've known better! to avoid reaching table limit i tried +1 progression, that worked better!! :)
progression +1u after 3 spins, keep bet until reach a new high, then reset.
Interesting idea, I will give it a try. However the 100+ unit draw downs with real money are not so fun. Only one very bad series needed, and boom...the roll is gone. But it's the same with most systems I guess.