The thing is e.g. I have a place system that is in profit at almost 10% on Turnover this is 4 years now. During that time there have been several horrific patches of 20 or 30 selections which showed a terrible loss on their own, if you isolated them I mean, even though overall the system was still in profit. If you'd started on one of those bad runs, you'd have tossed it away as a dud!