This is 3-9 numbers bet (played with a negative +1u progression)
I don't care how a system is designed or if it uses progression or not, as long as it's winning. I have tried many things, most don't work, only afew make it through a 10 spin trial.
This system is easy to play, fast winning/recovering
Procedure: For each new doublestreet hit -bet the 2 unhit numbers within the current STREET hit, also bet 1u on the unhit part within the SPLIT hit. (3 numbers bet). Continue betting this way for each new doublestreet hit, until 9 numbers are bet (3+3+3 numbers bet, in a progressive bet) When 9 numbers are bet, start a +1u progression, (beginning with 1u; do one spin when 9 numbers bet THEN +1u progression; 1-2-3-4-5-6-7....and so on, until hit).
Highest step in progression so far, was 10u. This progression is not perfect, it can make profit until 6 numbers bet, (after that it's just loss reduction), but on the other hand, recovery from loss is pretty good/fast.
First tests was played with 1u bets, (wingoal +200u, stoploss -300u)
Bankroll needed; playing with 1u bets, 300-500u
5/5 Games won
Suppose the numbers hit till now are 19,27
So you will be betting on 20,21,22,25,26,30 on the next spin (if I understood correctly)
Now if the next number to come is 29
So as per the rule the next set of numbers to include in the bet would be 26,28,30
Then do we make the next bet only on 7 numbers since 26,30 were already there in our previous bet?