Arithmetic spacing and percentage returns
For a lower price, upper price and count of levels, the fixed price step is the range divided by one fewer than the number of levels. Because the absolute step stays fixed, its percentage size becomes smaller at higher prices.
The calculator uses the same base quantity for a paired buy and sell, applies the supplied fee to each leg and reports the estimated step result. The top level has no higher level inside the range, so it does not create another completed upward cycle.
Why a profitable step is not a profitable grid
The market must move through the required levels and your orders must fill. A declining market can leave the strategy holding inventory with an unrealized loss, even if earlier pairs earned small realized gains.
The planner does not include queue priority, partial fills, minimum order sizes or exchange tick rounding. A displayed allocation may be too small to place on a particular exchange. Validate the intended order sizes and strategy behavior separately.
Use the grid as a cost sensitivity tool
Try fewer levels to increase spacing, or higher fees to model a less favorable tier. An execution buffer may also be needed for market orders; this simple planner models fee-adjusted level prices only. Budget allocation is an illustration, not a full inventory and working-capital simulation.
Questions about this tool
Does this run an automated grid?
No. It produces a plan and arithmetic estimates. Order placement, cancellation and position recovery are not included.
Why are percentage returns different at each level?
An arithmetic grid has a fixed price increment. The same increment is a smaller percentage of a higher starting price.