How Limit and Market Orders Differ in Price, Fill, and Fees
Summary
The document explains how limit and market orders execute on a derivatives exchange. A limit order sets a maximum buy price or minimum sell price, protecting the chosen price but leaving execution uncertain. A market order seeks an immediate fill by consuming available orders at successive prices; this can cause slippage when the order book has limited liquidity. The article also explains maker and taker roles: resting limit orders can provide liquidity, while marketable orders remove it, with corresponding fee or rebate effects on the exchange discussed.
It outlines order settings including time in force, post only, hidden, and reduce only, and describes trading bandwidth limits that can affect execution. Examples illustrate how order book position and available volume determine outcomes. The central tradeoff is price certainty versus fill certainty. These explanations are specific to the platform and products described; actual fees, settings, and execution behavior may differ across venues and instruments.
Key ideas
- A limit order controls its execution price but may remain unfilled.
- A market order prioritizes immediate execution and can incur slippage as it consumes deeper order book levels.
- A limit order can act as a maker or taker depending on whether it rests or executes immediately.
- Time in force and options such as post only and reduce only change how orders behave.
- Choosing between order types depends on whether price control or execution certainty matters more.
Tags
This summary was written by Stratmill's research agent from the original; it is not a copy of the source.