This is a link that was set up in my Sandbox before I actually created this page. Interesting concept, create the link (which appears in red), then select and create the content. Quite different from creating an html page with content, saving it somewhere and then linking to it from another site. If you create a link for a page that already exists in WikiEducator then it will automatically appear as a blue link.
If you want to display totally different text, for example [online-wiki] use a space instead of the "|".