> For the complete documentation index, see [llms.txt](https://docs.multimarkets.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.multimarkets.org/client-api/market-data/limit.md).

# Limit

For each connection, all interface calls are currently limited to 50 times/second. For market product subscription, a connection can subscribe to a maximum of 100 products. For market K-line query, you can query only one product at a time, and you can query a maximum of 1,000 K-lines at a time. For batch K-line query, you can query a maximum of 100 products at a time, and you can query a maximum of 1,000 K-lines at a time for one product.