What's better ? betting 2 numbers every spin or betting 1x one number, 1x two numbers and finally 1x three numbers. In all we have bet on average 2 numbers.
Apply this idea to the last 3 numbers spun and you'll get a new system to play.
The idea is to compare what is best... betting 2 numbers continuously or betting on average 2 numbers but in alternating this way for the next 3 bets 1 number, 2 numbers , 3numbers.
When you start a new cycle and are called upon to bet 1 number then you note the last 3 numbers spun and begin a new cycle where you'll bet 1x the furthest back number among these 3 numbers then the 2 furthest back numbers and finally all 3 numbers. You repeat this loop ad infinitum or until you win.