How to make text follow a line chart

Hi all, first post - so forgive me if this should be in the VBA section.

I'm trying to achieve a couple of text labels to follow a line/area on a chart on a dynamic/automatic basis, where the angles of the lines/areas can change depending on the inputs to the chart. Is this something anyone can help with? Currently I'm doing a manual rotation of text boxes.


Example one shows what I'm trying to achieve
example 1.PNG

Example two illustrates that the charts can change quite a bit.
example 2.PNG