The number of orders in the grid depends on the deposit of the allocated bot. A deposit should be sufficient to create all the netting orders.
We usually recommend a deposit not less than 200-300USD and the number of orders at that time 15-20.
Martingale sets how much the volume of each next order of the grid will be greater than the previous one. The more Martingale you have, the less rebound you’ll need to get a take-profit order. The bigger the Martingale, the smaller the first orders of the grid, which reduces profit but reduces risk. We usually recommend martingale at least 3-5%. With large deposits, you can increase martingale to 10%.