I had an simple indicator but cant find it anymore. You could drag drop it on a chart and it would remove borders of the window remove minimize, maximize, close chart. And you could have other charts full screen.
Example picture. How it should look like but that you couldn't move it it was locked.
Attached Image (click to enlarge)
Edit: found solution.
Anything above the line is an uptrend, below the line is a downtrend.