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Have you ever seen a sequence like this: 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1
Not exactly that, but its irrelevant. The probability of 1,1,1 is exactly the same as 1,2,3 or 1,1,2 or 2,2,2, or 3,2,1. The probability is not what makes roulette negative expectation - it's the unfair payouts for the odds.
Results are altering, thus a flexible bet selection which can be adjusted to the ever changing roulette flows is a must.
I'm not sure what you mean by "results are altering". And your reference to "flow" I assume means past spins like 1,1,1,1,1, but they have no influence on future spins, so no influence on the odds.