You can select only one of these features at the time - FREE% / TOTAL% or RISK REDUCTION / REINVEST PROFIT
Risk Reduction is based on losses while Reinvest profit is based on profit - the first reduce the size of the base order the second add what gained into the base order - you can find out more about this feature HERE
In short what you gain or lose will be added or removed based on the percentage - if you set 50% and you gain $100, $50 will be added to your Base, same for the opposite if you lose $100, $50 will be decreased from the current Base order.
In the article above you will be able to see why FREE% / TOTAL% and RISK REDUCTION / REINVEST PROFIT are different and how they work - hope it helps