Tick and lot size

Both Price (px) and Size (sz) have a maximum number of decimals that are accepted.

Prices can have up to 5 significant figures, but no more than MAX_DECIMALS - szDecimals decimal places where MAX_DECIMALS is 6 for perps and 8 for spot. Integer prices are always allowed, regardless of the number of significant figures. E.g. 123456.0 is a valid price even though 12345.6 is not.

Sizes are rounded to the szDecimals of that asset. For example, if szDecimals = 3 then 1.001 is a valid size but 1.0001 is not.

szDecimals for an asset is found in the meta response to the info endpoint

Perp price examples

1234.5 is valid but 1234.56 is not (too many significant figures)

0.001234 is valid, but 0.0012345 is not (more than 6 decimal places)

If szDecimals = 1 , 0.01234 is valid but 0.012345 is not (more than 6 - szDecimals decimal places)

Spot price examples

0.0001234 is valid if szDecimals is 0 or 1, but not if szDecimals is greater than 2 (more than 8-2 decimal places).