Look at the Middle dozen: Red or Black numbers - wait until either a black & red number hit in the middle dozen. Then bet for the opposite colors in the middle dozen. Bet All 6 numbers in the opposite color in the middle dozen.
For an example; Number 14 Red hit. All 6 Black middle-dozen numbers are bet; 13,15,17,20,22,24.
Negative progression 6 numbers:
This strategy seems to work *very well* playing RNG.....