This is a method that I found that can double or quintiple your money if you do it right.
Be careful when you do it though. 
I may receive some hate for this method. But it does work. 
In this example this person turned 0.2 BTC into 1.3 BTC
This is a example of the bet settings http://cur.lv/roabu
This is a example video 
http://cur.lv/roabz