Grid Trading Calculator

About this tool

Before running a grid between 10 and 14, you need the spacing, the cash required to fill every level, and the profit left after fees. Pick a spacing by guesswork and you can end up with a grid whose gain is smaller than the commission, or one you cannot afford to fill.

Ten levels from 10 to 14 with 1,000 shares each gives an arithmetic spacing of 0.4444 and about 120k of capital. At 0.03% commission per side one grid earns 444 gross and roughly 428 net, so nine grids total about 3,850. Switch to geometric and the low-price levels bunch closer together.

What it does

• LayoutArithmetic and geometric layouts Every number shown here maps to a field on the form, so changing one value recomputes the rest. The units are printed next to each input, which saves most of the usual mistakes.
• LadderBuy price for every level The main figures sit at the top of the result panel and the breakdown sits below it, so you can read the conclusion first and audit the steps afterwards. Nothing you type leaves the browser.
• CapitalCapital summed level by level All arithmetic runs locally in the page. There is no request to a server, no account, and no saved history once the tab is closed. Use the example button if you want a set of values that is known to work.
• FeesNet per grid after two commissions Intermediate quantities are kept in the detail table. When a total looks wrong, tracing back through those rows is much quicker than staring at the headline number alone.
• Break-evenBreak-even move included The formula is written out in the notes rather than hidden behind a label, so you can check it against a spreadsheet or a textbook. Values are rounded only for display.
• Level countBetween 2 and 200 levels Inputs are validated before any calculation starts. Empty or impossible values produce a short explanation instead of a zero, a NaN, or a made-up answer.

How to use it

1. Start by filling inenter the lower and upper price The main figures sit at the top of the result panel and the breakdown sits below it, so you can read the conclusion first and audit the steps afterwards. Nothing you type leaves the browser.
2. Next, setset the number of levels All arithmetic runs locally in the page. There is no request to a server, no account, and no saved history once the tab is closed. Use the example button if you want a set of values that is known to work.
3. Then pressset shares per level and the fee rate Intermediate quantities are kept in the detail table. When a total looks wrong, tracing back through those rows is much quicker than staring at the headline number alone.
4. Read thepick arithmetic or geometric The formula is written out in the notes rather than hidden behind a label, so you can check it against a spreadsheet or a textbook. Values are rounded only for display.
5. Finally, usepress Calculate and read the ladder Inputs are validated before any calculation starts. Empty or impossible values produce a short explanation instead of a zero, a NaN, or a made-up answer.

Things to keep in mind

• Rangeupper price must exceed lower All arithmetic runs locally in the page. There is no request to a server, no account, and no saved history once the tab is closed. Use the example button if you want a set of values that is known to work.
• Round lotsenter shares in round lots Intermediate quantities are kept in the detail table. When a total looks wrong, tracing back through those rows is much quicker than staring at the headline number alone.
• Blank feea blank fee is treated as zero The formula is written out in the notes rather than hidden behind a label, so you can check it against a spreadsheet or a textbook. Values are rounded only for display.
• Taxesstamp duty is excluded Inputs are validated before any calculation starts. Empty or impossible values produce a short explanation instead of a zero, a NaN, or a made-up answer.
• Display capthe ladder lists at most 12 levels Every number shown here maps to a field on the form, so changing one value recomputes the rest. The units are printed next to each input, which saves most of the usual mistakes.