Purple dots in power profile

Hello,
can you explain what does those purple dots at 18’ and 30’ mark means?

Thank you

They are related to your modelled power curve.

In Options you can choose to show/hide this as well as change to different models

Thank you Ben. I use the default model that, as specified in the post you linked, requires just 1 maximal effort.
So I would have expected to see just one point highlighted instead of two.

You probably only see one. One on the model and one on your curve. Your lines are exactly on top of each other.

you have 2 curves, this season and 90 days

If I remove one of the two curves, (i.e. 90 days) I still see the two dots.