Hi, unfortunately this will not be implemented in QueueMetrics.
This is mainly due to the fact that in order to enable that, the dev team would like to implement auto-logout as well when agents close the agent page.
However this is much harder to do because of all the different ways that a page could be closed either by mistake: crash, computer turning off, or on purpose by closing the browser, opening a link etc.
For this reason the suggestion has been removed from our roadmap.