X-Ray cloud - Test Execution - Planned vs Actual burn down chart

[Brett Rogers]

I was wondering if anyone had worked out how to produce this graph using an existing gadget or within x-ray reporting?

I've tried adding planned execution dates to tests but I can't set it against an instance of the test within a test execution. 

I have the same test being executed in different cycles (SIT and UAT) as well as being executed by multiple users in UAT.

This is a common graph to track overall progress on larger projects, so I'd be surprised if someone hasn't already worked out how to do this (or I've just missed it)

Thanks for any help