Explanation of the trick

First it is to choose a table or a roulette American or European.The difference is that the EU has only one zero. While the U.S. has two.
The trick is to choose to bet on the dozen or rows in the choice because the types of games (dozens or rows) gives three times the gain setting. By focusing on two rows or two dozen all considering that he has three from each can be said that your chances are in fractions 2 \ 3, but it should be considered zero (European) or double zero (American). So if calculated as a percentage there are 36 numbers on the roulette table in general, if we add a zero or two zero gives the calculation is: 24 \ 37 or 24 \ 38 the respective percentages are 64.86% (zero) and 63.15 % (two zero). By building twice (the same amount) you win three times (the amount wagered) so you earn your once. Je vais vous donner une Exemple : I will give you an example:

If you bet $ 25 (1st row) plus $ 25 (2nd row) that provides $ 50 bet, if one of your fate row you earn $ 75 So $ 75 - $ 50 = $ 25.

But there are some used this trick because if you lose it will not win you have to win twice to equalize your loss.