Currently have a filter:
status != Closed AND (category IN ("xxx","xxx","xxx","etc") AND
updated <= startOfDay(-7)) AND (assignee IN (xxx,xxx,etc))
This provides me with all issues that have not been updated in a timely manner (3 days, 7 days, and 14 days) based on the category of the project and assignees. I also tried different jira gadgets to show this information so far the best has been multiple filters line chart gadget. The issue I am having is there is no way to keep track of what issues have been previously flagged. Is there a filter that allows you to check the update time between comments?