Well that depends, if the FTSE 100 doesn't turn around soon I could be a big chunk down, I'm currently £600 down over the last week! I haven't actually lost that cash yet though as the positions are still open. If it reaches ~6625 again I'll be breaking even and anything over that will be profit @ £5 per point. It was 6800 at the end of July and about 6750 about week 1-2 of August so I have no doubt it will rise again it's just a matter of how long I have to wait before I can close the positions at a profit. Of course there's always the possibility of it continuing to drop, if it dropped to 6000 ish they'd automatically close my positions at about a £3k loss! That's unlikely though... I hope.
When I started I spent a lot of time coming up with a strategy, for the first 6 weeks I was betting 11p per point and over 6 weeks my £50 turned in to £160 which is a nice return in terms of percentage. Unfortunately as soon as I upped the cash my strategy seemed to go haywire and I lost about £900, I think that was more to do with my mentality though when real cash was involved. Still, fairly cheap to learn about it.