Oh also I just wanna note that if we go by a previous convention, there is a perfectly good symbol for "this is an external link": back in the days when Geocities was relevant, it was pretty common to see external links marked by a little Earth gif after them, because it was a link to somewhere else on the World! Wide! Web.

If your browser feels like displaying Wingdings codepoints, something like this: http://egypt.urnash.com 