You should probably look into the nodejs version of TW5. This should allow for what you want.
In vanilla TW5 there is no satisfying soltion: There is the possibility to use iframes and you can do a search on tiddlywiki.com for "External text tiddlers". Both variants lets you show but not properly interact with external tiddlers. <:-) -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/9df08331-6008-4792-94b6-4b8ab2ca9580%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.

