I'm sorry for my bad english.
You can see what I mean here
https://www.youtube.com/watch?v=jUaxbGnfZX0at 5:40 In skydemon the circle around the aircraft symbol change in color when a bearingless traffics approach
at 8:30 In the web radar you have a tab on the top left corner when a bearingless traffics approach
Regarding the web radar, I was wondering if is it possible to have, in addition to the left corner tab, a background color changing from black to dark green, dark yellow, dark red), or a circle bold line changing in color, as you can see on skydemon. I suppose it will be more noticeable by peripheral vision, so the pilot don't need to be involved in continuos monitoring of the screen.