Please open Forex Copier 2 program, click "Settings" on Receiver account in Forex Copier 2 program.
Switch to "Lot/risk management" tab and click "Use custom lot size".
Then select “Proportional lot based on Source/Receiver Equity ratio” and click “Save and Finish” (please see the screenshot).
After this please click “Apply Scheme” button so Forex Copier will start using new settings.