One of the Flight Tracker options is that you can put in the airport code, this is in the left frame. When I do that, I get a list of all flights in and out of that airport, plus, up at the top right of the screen is a little map. when I click on the map to enlarge it, I can sometimes see green colored planes and blue-ish colored planes. What’s the difference in color mean? Incoming and out going?
The blue planes are inbound to or outbound from that airport. The green ones are other traffic.
When you click the map, it opens in a larger window and on the bottom, says what each color is for. 