# Order Types The following order types are available on Pacifica: * **Market:** An order that executes immediately at the best available market prices. Typically used in order to immediately enter or exit a position. * **Limit:** An order that specifies the price at which it will be executed. Limit orders can remain active based on different time-in-force settings (see below). Typically used when execution price matters more than being filled immediately * **Stop Market:** A market order that is placed when a price condition is met. Typically used to take profit or limit losses. * **Stop Limit:** A limit order that is placed when a price condition is met. **Time-In-Force:**\ All limit orders on Pacifica belong to one of the following TIF options. * **Good-Til-Cancelled (GTC):** The order remains active on the orderbook until it is either filled or cancelled. * **Immediate-or-Cancel (IOC):** The order attempts to match immediately at the specified price (or better). Any portion of the order that cannot is not filled immediately is cancelled. * **Add-Liquidity-Only (ALO):** Also known as **“Post Only,”** this order is added to the order-book only if it would does not immediately match against an existing order. * **Top-of-Book (TOB):** A special order type that allows "ALO (Post Only)" orders which cross the orderbook to be placed at the best bid/ask possible, instead of being cancelled. Best bid refers to lowest ask in orderbook minus one tick. Best ask refers to highest bid in orderbook plus one tick. \ Note: In order to protect liquidity providers from adverse selection, all market orders, TIF GTC, and TIF IOC orders are subject to a randomized 50-100ms delay. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://pacifica.gitbook.io/docs/trading-on-pacifica/order-types.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.