[DouweM]

I'm not familiar with Google Finance, but the author states "This part of the code is responsible for querying an external domain for a newsfeed to be displayed on the plot as an overlay.". I'm guessing they just happened to come across a Google Finance URL using the &ntrssurl= parameter and figured that would be worth digging into.

[Ecio78]

He says also in the comments: "Manual testing, the ntrssurl parameter was present in an example in the documentation for adding custom news feeds to the plot :) ."