Learn Roulette Video Source & Info:

There is no secret to win on roulette, but a player can try to take advantage on the roulette game, by looking at the last game played table.
If there is a color, whatever red or black, showing more than the other color, and also, a serie of numbers from 1 to 18 or 19 to 36,
you can place your bets on a selected color and range of numbers from 1-18 or 19-36. You can expect then to get a theorical advantage.
Thought there are no ways to win everytime on roulette, a player can use a simple logic as a strategy to try to win.

Source: YouTube