# Listing Engine On Omni, new perps markets are permissionlessly listed, which means that they are automatically listed once they fulfill certain criteria. These criteria include reliable price feeds, activity requirements, decentralization requirements, security checks, and more. Markets may be delisted if they fail to sustain the requirements. A delisting means all positions will be closed at the settlement price. The settlement price is an exponentially weighted moving average of the instrument price at the time of the delisting. --- # 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.variational.io/omni/listing-engine.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.