Ok. Here's one I'm feeling good about.
It requires the use of Roulette Killer (see downloads)
Populate with 10 most recent spins. Click the stats button.
What you're looking for in stats is the 1st, 2nd, 3rd dozens section. Look at the percentages
You want to bet on the dozen with the middle percentage (i.e. 1st 35%, 2nd 33%, 3rd 32%)
(Normally, it suggests you select the one with the greatest percentage, but it is often asleep,
the 32% dozen is the active dozen, [but could stop it's streak at anytime. The middle percentage [and has proven in early tests] to be the best of the three choices.
Input the results as they come in, (remember to watch to see the percentags change--and you want to bet on the middle % dozen [if it's a tie with another, don't bet]
Once it hits, reset and repeat system.
Your averages system is based on Gauss Bell theory from physics. Sometimes it works and sometimes not. That's true that one with the highest percentage can be soon exhausted and retire and the middle one will take the place of the retired one, but that's just a myth. You need at least 50 spins to see a playable difference.
Hermes
Other option would be to ride on the top of the waves. Bet cps10 ladder progression on that one which shows highest percentage until it breaks off and then jump on the next leading dozen. One dozen can lead for 60-70 spins. Problem game starts when all 3 get balanced. Check the columns too because if dozens are balanced the columns can do the opposite. The imbalance is to exploit.
Cheers Hermes
Good advice (to ride the waves of the most active dozen), because you assume the dozen will turn cold doesn't mean it will.
At the time the second most active dozen seemed to be the most logical in theory.
Recent 12 same dozen hits proved you right at the Riverbelle wheel. Ok
Follow the leading dozen everybody...