Ok, tested this for fun,..but it proved to be a decent Flatbet-system, although it requires you do tracking for the first 80-100 spins or so,...it's betting the 2 coldest numbers. i've got a 10/12 wins from the first test (as you can see in the charts) with a +600/-600 wg/sl.(played with 5u bets) Also, as you can see in the chart, this won't win forever, atleast you need to re-track after 400 spins or so, (because after 400-500 spins , the chart usually goes down, after reaching a peak), but i don't think it should be played longer than 200-300 spins,
Procedure: Track spins, until you got *2 numbers* hit 0 times (not hit) that usually takes 80-100 spins, THEN you bet those 2 numbers,.... after a few hits, you re-bet the two *coldest numbers*...and so on
The knowledge I have added from these forums is very beneficial.