> ## Documentation Index
> Fetch the complete documentation index at: https://docs.pacifica.fi/llms.txt
> Use this file to discover all available pages before exploring further.

# Tick and Lot Size

> The following doc describes how tick and lot size, as well as rounding, are handled at an API level when Pacifica's endpoints receive requests with price and amount fields.

Both `'price'` and `'amount'` fields in order related API operations are subject to rounding, needing to be multiples of tick and lot size.\
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Generally `tick_size` is determined by the rightmost decimal place of a symbol's current price, and prices generally have five significant figures, with the exception of assets with more than six integer places, where sig.figs = #of integer places.\
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For example:\
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If `'price' = 123.45`, expect `'tick_size' = 0.01`\
If `'price' = 123456`, expect `'tick_size' = 1`\
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Generally, `lot_size*tick_size = 0.0001 or 0.00001`, based on the market.\
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For the exact implemented `tick_size` and `lot_size` of each market, call the [market info](/api-documentation/api/rest-api/markets/get-market-info) endpoint to verify.

## Rounding

Pacifica accepts requests containing `'price'` and `'amount'` fields only when they are multiples of `tick_size` and `lot_size` respectively. Any requests with incorrectly rounded `'price'` and `'amount'` fields will return `'"Bad Request","code":400'`

For example:\
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BTC has `"tick_size": "1"`, `"lot_size": "0.00001"`\
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A request where `"amount": "0.000005"` will return `Status 400: Bad Request`\
A request where `"price": "100_000.5"` will return `Status 400: Bad Request`

A request where `"amount": "0.00002"` will be accepted\
A request where `"price": "100_001"` will be accepted