I see. There are multiple ways you can do this. I think the simplest would be to change the angle under the render transform tab. You should keep the blueprint that I previously showed you, but on the event graph under tick do an if branch. If the progress is less than half way, set the angle to 0. If it is over half way, set it to 180. This would not look good if there is a design on the progress bar. If there is, you can try using two progress bars on top of each other with different fill directions and swap between which one is visible.