Handling all kinds of variance is the only key to win this game. IF someone can predict the future outcomes seeing current trend(if it is possible with any degree of certainty), it will be an advantage play again with a kind of edge playing at your side. I do not believe or expect any fixed edge coming to me by any divine knowledge to earn from this game.
I have learnt the art of survival in extremes and winning thereafter without going too deep or expecting any corrective wins, that is a fallacy. It is both a science and art and I can compare it with breaking stones with empty hands. Inconceivable and un-achievable by most, even if the entire logic and techniques are explained.
Remember, the house edge/house fee/unfair payout creates a kind of variance by itself, leave aside the other factors. In the long run we first need to fill in the gap created by 2.7% house edge edge first. Every bet will get this much variance for sure, in the long run. People seems to miss even a remedy for this.
If I say, there will be 500 wins of a number in 18500 spins and we can not get the scatter of the wins, most of the intelligent players around here will have a soar throat beating just that. If the number of win lessens to 450, they will lose thousands of chips and might be only losing all over. I have seen this clearly in my #3 challenge on zumma book.
Go and keep dreaming of getting more wins than losses to win easily and I believe that is not going to happen any time soon. Let me sharpen my skills in surviving the worst and winning in near average cases, thereafter. It seems the old failed progressions attempts had very bad impact on money management onlookers and they thought that the end.