Roulette A roulette wheel spin is a purely random event. Each spin has exactly the same probability irrespective of past results. The chances of red/black (or odds/even, high/low) occuring in the next spin are ALWAYS and forever 1/2 (ignoring the zero/s for the moment) no matter what the past results. Thus, if 10 blacks had occurred in a row in the immediate preceding 10 spins, the probability of red in the next spin is 1/2. The probability of black is also 1/2. An event of 'ten blacks followed by one red', has exactly the same probability as 'eleven blacks'. No amount of computing or tailoring of past results, will increase your chances of picking, say 'red' in the next spin - it will always have a probability of 1/2, regardless (continuing to ignore the zero/s for the moment). Anyone who believes they tailored past results to determine future ones is, consistent with this forums (physics / maths) strict requirements a complete crackpot. In the 'Mathematics Of Horse Race Gambling' thread, poster Tach continues to believe and assert that he somehow tailored past results to derive a benefit / profit from future ones, therefore his is a complete crackpot.