RULETA

Martingale system:
This is the most famous, well-known and widely used system. It is also the most treacherous

History of the system:
The system is named after John Henry Martindale, who was a casino owner in London.

The principle of the system:
You bet, say, $1 on the color of your choice (red or black) and keep betting only on that color. You spin the roulette wheel and wait...
If you lose, you double your bet, so next time you bet $2. Then, say you lose again, you bet $4 next time.
And if you lose again, you bet $8 next time. Let's say the color you bet on has finally come up. The casino will give you $8 to go with your $8, so you now have $16. Calculate how much you bet: 1 + 2 + 4 + 8 = $15, so - you've made $1! Then you start betting $1 again...