Thanks jcl. I am not sure what's wrong, but on an FXCM demo account I have currently a discrepancy between FXCM and Zorro, they are reporting an equity of $3920 vs $5686 respectively. And that is about a week after restarting Zorro with the Z12 system. The initial amounts where identical though. It appears to be more prevalent when there are a number of winning trades rather than with losers. (This is with BrokerPatch = 3 in the Zorro.ini file). Looks more than just slippage to me.