Account limits

Every account carries limits set by STX, and users can set their own lower ones. They are managed in the STX web and iOS apps; there is no REST endpoint for them, and nothing here changes them.

Two of them affect trading through the API, and both surface as a rejected order rather than as an error about limits:

Limit	Effect
ORDER_LIABILITY	Caps your total outstanding order liability at any moment
MAX_ORDER_LIABILITY_PER_ORDER	Caps the liability on any single order

Defaults are calibrated for casual participants, not market makers. If you are sizing orders and seeing rejections you cannot otherwise explain, this is the first thing to check. Contact STX support to have the ceilings raised.