Crypto trading · Pro
Post-only order
What does Post-only order mean?
A post-only order is intended to enter the order book as resting liquidity rather than execute immediately against another order. A marketable order may be rejected or cancelled under the venue's rules.
Example
A buy limit that would immediately cross the ask is cancelled because post-only is enabled.
Illustrative example; not a provider’s quoted offer.Why it matters for prop traders
It controls liquidity-taking behavior, not execution certainty. A post-only exit may remain unfilled during a fast move.
Sources and further reading
The following primary sources support the terminology. Provider rules describe their own products and may change.