Hello everybody,
Today, I have a requirement need getting summary data of issues from JIRA and show in my Website like this:

Let me explain this chart.
This chart will show total number of UnResolved issue by Day
Example: in 14-May we have 50 Unresolver Issue. But in 15-May 15 issue has been Resolved. So, total of UnResolved issue in 15-May is (50-15) = 35 issues
And, My question is:
1. Can I use REST API to get Summary data for this requirement?
2. If #1 can not do it, What is the best solution for this requirement?
Hope that I can see much Advice from all of you.
Thank you very much,
TuanDPH