https://www.teletrader.com/ for an old-school terminal-like feeling.

I wonder if there are any FOSS projects I can self-host. would be nice to have such data in a terminal

Koyfin:

https://www.koyfin.com/home

Maybe not:

HEADS UP, YOU ARE USING A WEB BROWSER THAT IS NOT SUPPORTED BY KOYFIN This means that some functionality may not work as intended. We recommend using Google Chrome with our site.

I use Firefox and have no issues, though I only use it as a dashboard for the markets. There may be functionality that breaks that I'm unaware of.

"I don't know how to read most of this, but I do see that everything's red."

Yeah I'm feeling pretty much the same.

If this was the status of our builds at work, I'd be very worried.

It's interesting to see how it spikes up and down though, never really paid attention to it until now:

https://www.koyfin.com/charts/gip/INDU_EC?t=SPX&t=NDX&frame=...

Tradingview

Quick link to the live view for DJI for anyone who doesn't want to search for it: https://www.tradingview.com/chart/?symbol=DJI

S&P Futures are probably the better pick for a 24/7 picture. https://www.tradingview.com/chart/?symbol=SPX500USD

IB software is good, though a little complex.

Trading View and Investing dot com