Post-only order is a specific Trading coordinate in the Bitcoin knowledge graph. In practical terms, it identifies the subject described here: A limit order rejected or repriced if it would execute immediately, ensuring it adds liquidity. This definition is narrower than promotional usage and should be read together with the implementation, date and evidence attached to the entry.
Post-only order is best understood as part of a system rather than as an isolated definition. Its related coordinates show the mechanisms, incentives and historical records that give the term practical meaning.
Post-only order describes how participants value, trade or obtain exposure to bitcoin. Market behavior can affect adoption and mining economics, but it does not rewrite consensus rules. Price evidence and protocol evidence answer different questions.
Understanding Post-only order helps distinguish a verifiable Bitcoin mechanism or historical record from slogans, products and market narratives.
Primary or authoritative records make these details checkable: a post-only order is accepted only if it would add resting liquidity under a venue's matching rules; otherwise it is cancelled or repriced, depending on the exact instruction. They should be verified before using the coordinate in analysis.
The practical limit is: post-only does not guarantee maker fees, execution, queue priority or zero adverse selection; crossed markets, latency, hidden orders and venue-specific behavior matter. A definition, office, chart pattern or published claim is not by itself a prediction or Bitcoin consensus rule.
For the clearest picture, read this entry together with Limit order, Maker–taker model, Order book, Market microstructure, Bitcoin. The reverse links also lead from Maker–taker model.