# Market open and close Digital asset exchanges operate approximately 24x7x365. For daily aggregated data, the opening price is calculated as the first trade at or after 00:00:00 UTC. The closing price is calculated as the last trade prior to 00:00:00 UTC. --- # 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.kaiko.com/rest-api/general/getting-started/api-output/market-open-and-close.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.