The Max Order Size in the Account settings is the maximum number of lots that can be copied for a single order (not for accumulated positions). This caps the order size. If you set a Max Order Size to 10, the maximum lots copied is 10, but, of course, if the computed number of lots to copy is smaller than 10, it will copy only this computed order size. If you don't set any Max Order Size (default), the system copies the number of lots computed using the Risk Factor, no matter the order size, as long as there is enough margin. This value does not work like a filter. It means that if the min order size allowed by your broker is bigger than this maximum trade size, the Trade Copier copies the minimum trade size. In this particular case, the system always tries to copy the trade with the minimum allowed value.