Grid mode: Arithmetic: maintains a consistent difference between each grid level so grid levels become (1, 1+r, 1+2r, 1+3r...). Geometric: maintains a consistent ratio between each grid level so grid levels become (1, 1*r, 1*r^2, 1+r^3...). Investment amount: this is the total amount of the selected currency the bot will use to place buy and sell orders across the grids. The maximum amount is usually the available balance in your trading account for the selected currency.