Roulette betting sequence 1, 3, 7 on Red and Black.
This is a simple roulette betting sequence going from 1 to 3 to 7. The betting system follows always the same 1 3 7 sequence,
and then all depends of the color selected and on which color the betting sequence was started.
Here on this video I had some incredible red color series. But I got some good hits, and some when betting 7 bet units.