I'm trying to create a visualization of a large project containing many epics and I want to see the progress as a % complete in terms of story points. I have that set up by customizing the Plan > Roadmap view and showing the "Progress (story points)" field except that epics already closed ("Resolved") are not shown. That means in the long run of the project the percent complete sort of goes up and down (decreasing when an individual epic is marked closed).
In the attached picture, you can see I have Milestones 2, 3 and 4, but Milestone 1 of that project is not displayed because it is already completed.

Is there a way to simply include closed epics in the Plan > Roadmap view, including their story points in the grand total and in the progress bar?