Roulette strategy: columns\n\n On the second column, you bet double the amount, and on the third, even quadruple. Thus, each round, you double your bets in order to recoup any losses. Within the roulette strategies, this is a more risky strategy, but on the other hand, it can also be very profitable.
That's because roulette is a pure game of chance and the odds always favor the house (i.e., the casino), no matter which bet or combinations of bets you make, and regardless of what numbers have come up in the recent past. You will never, in the long run, overcome the house edge.