First of all, clean your code. It will help you make less mistakes and will help people in the community read and understand your code much quicker. Please refer to these and these articles.
I have attached a cleaner version of your VI for your reference.
As I understand, you want to display the intersection points between the lines and the circles on the graph. One way of doing this is finding the intersection points mathematically and programmatically creating cursors on the graph.
Please refer to this website to find the intersection points mathematically.
To create cursors in the block diagram, check this article.
Please let me know if you need anything else.
