For those of you who want a very simple blueprint only solution for top-down games. I made my own minimalistic system. This ONLY works in top-down games though. But if you are making a top-down game, this is (I think) a much simpler and cheaper solution than making complex calculations and having to require c++ code.
Just make this into a global function. And call it in the widget that you want to always be visible on the edge of your screen. I haven’t added the none edge appearance yet though, but that should be extremely easy to add if you need that.