Here is the answer from this Reddit post
https://www.reddit.com/r/interactivebrokers/comments/xphwie/adding_a_twitter_feed_to_tws/

zernichtet
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3y ago

Cool idea.

I think TWS would replace $TAG by appropriate symbols for your newsfeed, e.g. the stock you're currently looking at or stuff in your port. So TWS only accepts URLs with the literal "$TAG" in it. So just put it in there without meaning something:

https://nitter.net/Deltaone/rss?$TAG

And that works. Obviously, this feed will then not be filtered by $TAG, as that part is simply ignored by the web server...
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