# Order Types **Order Types:** * **Market:** An order that executes immediately at the current market price. * **Limit:** An order that executes at the selected limit price or better. **Order Options:** * **Post Only (ALO):** An order that is added to the order book but doesn’t execute immediately. It is only executed as a resting order. * **Immediate or Cancel (IOC):** An order that will be canceled if it is not immediately filled. --- # 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://docs.xpressprotocol.com/trading/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.