Iceman since many years ,I study the roulette. The excel software is very appropriate for analyse the random streaks Every chance has a own random sequence. Systems are based on these sequences. Every system can be simulated with the program. For ECs, dozens, double Streets and some particular chances. Before designing a system you have to learn the features of a random sequence. My programs are free available.
When you play real roulette, it is important to use different strategies.