How to make UI circle follow UI Line Renderer

I am using the UI Line Renderer from the UI extensions repository on bitbucket : https://bitbucket.org/UnityUIExtensions/unity-ui-extensions

I want to have a UI circle(also in the UI extensions repo) move along the line based on a variable. The problem is I'm not sure how to convert the points on the line to a rect transform for the circle. I just want to move the circle along the line but the coordinates seem to be completely different. Modifying the x and y positions of the UI circle by the amount of the distance between the point I want it to be at the and the previous point never places the UI circle at the right spot.