f you want to trade with the same lot size every time, then you should use the FixedLots parameter. However, if you want to use a Money Management and trade with risk level, then you should use the AutoMM option. Let’s say you want to trade with 5% of risk level, you set AutoMM=5. Then the EA would risk 5% of your free margin for 100 pips loss. This means that if your balance grows, so the lot size will. For example, if your free margin is $10 000 and you use AutoMM=5, then your trading lot would be 0.5 lots.
NOTE: If AutoMM is greater than 0(zero), then the FixedLots parameter is not taken in consideration!