Graphs is a real UFO tracking tool! It shows you alien activity in not radar covered zone. An absolute life saver especially at higher difficulties when each score point matters.
Essentially, this is open information given to player. However, at times, it is difficult to visually extract it. Here is the proposal for QoL feature graphs improvement.
Now I am calling it QoL because in my experience all information I need is there it is just annoying to advance clocks by seconds and keep notepad and pencil ready to record these numbers over and over again. Let me know if you think it changes strategic game play. And, as always, it could be off by default if anyone does not like it.
Feature:
Alert player when UFO activity in region continues for considerable period of time assuming UFO reached its target region, not just passing by.
The time threshold or activity threshold and reminder frequency is up to configuration.
Also could be configured for activity happening outside of radar coverage to not annoy player late game.