I have a few, gridmeupfx on cable and EURUSD, a free forex robot and some I've paid for. Risk is a lot more for these competitions though, I wouldn't probably use as much risk on a real account - the fills wouldn't be the same and the potential losses would be painful. In fact I'm currently in a drawdown on this account so I'm not confident of my positioning in the competition at the end. Yesterday I was 4th, today I'm currently 23rd lol. Hence my tweet this morning to someone that commented on my losses about not using grid traders. In fact you can, but you need to have filters on them. I know someone that's doing very well with his version of the one I've got, only he has the enhanced one, which has filters. Mine has the basic, which has none. Hence the drawdown :)