In my below example, I have two open issues. Their original due date is when the issue to get close. For some reason, they revised the closure date in future.
|Issues||Reporting Date||Original Due Date||Actual Closure Date|
For the issue#1, 4/30/2018 < 6/30/2018 then I need to add the counters from the reporting month until Actual Closure Date satisfies. Then use the "total Count" to plot the line graph.
|Reporting Month - 4/1/2018||Actual Closure Date||Actual Closure Date||Total Count|