It isn’t a winning strategy in the long term, though – whatever you do in European Roulette you will tend towards losing an average of 1/37th of the total amount you wager, the house edge is built in. (1/74th for French Roulette, 1/19th for American Roulette with the 0 and 00).
@mark1 I’ve always felt that physical roulette (rather than online) is winnable, but I don’t think I could do the level of analysis required to win. You only need a small advantage (and a large pot) to overcome the house edge.
A lot of wheels are biased, so certain numbers or sectors are more probable than 1/37th. Also, a lot of croupiers are not random, so based on the point of release, certain sectors will be more probable. But for biased wheels, you need to analyse thousands of throws. And for autopilot croupiers, you would need to analyse and react very quickly and apparently innocently.