Thanks for all the positive feedback so far

@Financial_Genius: Investment is not possible at the moment (altough the feature is ready to roll out). I've thought a lot about it but there are still some uncleared issues about conditions and side effects. For example many people point out that a 35% comission would be too high compared to competitors whereas I think any lower percentage wouldn't be worth it (as long as you don't have an insane volume such as JD).
@BigMac: RND button is fixed (page reload required). It sets your bet amount to a random value between 0 and 10% of your balance.