The Expert Advisor will calculate the position size on its own. You can choose between four risk settings. On High Risk, the Software will use for every 3500€ 0.01 Lot as its start Lot. That means after you reach 7000€ the Software will start using 0.02 Lot. On a Cent Account, the Software is using 0.1 Cent Lot (equals to 0.001 normal Lot) for every 350€.