Hi Richard, i believe the lot size is calculated based on the account size and risk mode/percent selected in combination with the SL/TP for each optimisation version. If your target is 10% (10.000) then a trade of 1000-2000 range could make sense as it would ideally take 5-10 win trades in a row to hit your target. However, it might be wise to half the lot even if takes longer as this could mitigate any high losses as well if things go the other way.