# Order Book Orders on Boros are placed on Implied APR of the asset, which is the yield denominated price of the asset. Learn more [here](/boros/boros-docs/interest-rate-trading/interest-rate-trading-yu-trading.md#implied-apr-and-fixed-apr). ## **Order types:** * Market: Order executes immediately in order of the best prices in the order book. * Limit: Order executes at the selected limit price or better. Limit orders on Pendle are Good Til Cancel (GTC) orders, which means they will be available in the order book until it is filled or cancelled. The order book will be closed at maturity and all orders will automatically be cancelled. --- # 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://pendle.gitbook.io/boros/boros-docs/interest-rate-trading/order-book.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.