One of my guesses might be if you see something like.... R, B, R, R, B, B, R, B, B, R (5 Reds-5 Blacks) the "count" would be "neutral" or 0. Six reds/four blacks = Red +2 or Black -2 ...etc. I don't know the optimal number of spins to follow, using a 10 count here.

I suspect it would be related to the length of the progression, regression or whatever one proposes to use.

Also need to figure how the zero(s) would fit in.