# Topic Metrics
EMQX provides a topic monitoring feature(called Topic Metrics) that allows you to count the number of messages sent and received, the rate and other metrics for a given topic. You can view and use this feature through the Dashboard's Diagnose -> Topic Metrics page, or you can configure through the HTTP API.
After the Topic Metrics feature enabled, you can add new topic monitoring rules by clicking the Add Topic button in the top right corner of the page.
At the moment, topic filters with widecards are currently not supported, for example,
#. You have to use the specific topic names.