Hi,
You can download and use this, from Kevin Holman. Always test these in your test environment before using in other tiers.
There is also a .xml that you can load into (your test environment first to ensure it works for you). It has a really good explanation of how to create the dashboard along with a download link at the bottom of the article.
https://scombythomdotcom.wordpress.com/2014/06/04/rules-and-monitors-on-your-dashboard-part-2/
Hope this helps you.