This is a tweak of my old system "Dozen Repeater". Hitrate is good because, 1. a dozen will repeat more than twice frequently...2. I has been tested before

This is played with 4 splits;

Trigger: Wait for a dozen repeat (2 different splits hit)-- then bet the remaining 4 unhit splits in that particular dozen ONCE, then STOP.

Progression: 4 splits negative progression

1.  1.  1.  1.  2.  2.  3.  4.  5.  6.  8.  10.  13.  17.  22 28 36 46 59

more spins...