If you just color the axislabel with the color of the curve you’re done. It is really that simple.
Now that we’re discussing clarity, in 85%+ of the workouts I’ll never go more than 20% above FTP, while TR chooses to plot all the way up to 200%. Again wasting a lot of vertical real estate. And I can’t resize the graph in the Y direction to use the full size of my screen either.
So my HR during exercise will be in the 120-180 range, while the graph goes from 0 → 600W. There is just no space to really read it.
Edit: rereading my post I sound way too sour. Let me be clear, I love TR, and this is just a small item 