Hello I have a question.
Can I set up a strategy for playing roulette where I bet on red and black at the same time in differing values depending on the last 9 rolls?
Don't bet red and black, odd and even and so on.
If you do that, you bet 36 (2x 18) numbers out of 37.
All time you bet 1 unit on red and 1 unit on black, you get 2 units back all the time, as long as Zero is not coming. You don't win anything.
When Zero comes, then your 2 units are lost (depending on zero handling).