Answer
It is depend on your number of grid. Lets say your number of grid is 50, it means your have 50 orders from your investment. 500 USDT divided into 50 orders is equals to 10 usdt per order. 1% from this order is 0.1 usdt. You can tweak your settings by adjusting the number of grid so you can manage how much portion per grid you want in every order.