Of course, you can, but it is unlikely to help you win. Any strategy guide that promises to increase the number of wins you get is lying to you. Roulette is a game of luck and chance and there is nothing you can do to influence where the ball will land. Strategies might be able to help you decide on the kinds of bets you pace and when and this might help you in the long run, but anything could happen and no amount of calculating or using strategies will significantly improve your winnings.