Tradingview is accessible for Linux as a Deb or Snapd package.
Snapd is evil for reasons I do not understand. Deb packages are probably not wise for me to attempt to navigate without creating grave errors. How would the seasoned Linux user reasonably approach this? Cachy_OS is my intended home, but I need to be able to do the things I need to do.
Check the AUR for packages or build the application from source.
Welcome to the forum 
Then you’ve come to the right place, because hardly any OS is better documented than Arch.
My recommendation: read it.
Learn how to install the desired packages using the Arch Linux package manager pacman and its AUR helpers, which you can find here as paru.
If you’re interested, this is the right place to ask questions or report bugs. More information here: Submitting Bugs | CachyOS
Those are just the ways that TradingView offers directly. You’ll often find that on an Arch Linux based distro(like CachyOS) the community has taken measures to offer software though better sources, such as your repos or through the AUR.
In this case, the software you’re looking for is available through the AUR.
This source would be preferable to .deb(not compatible with Arch Linux) or snap.
pacman can only work with your native repos, so you’ll need to use an AUR helper to install this instead. CachyOS’s is paru. It’s generally good practice to system update before installing anything so you could:
paru -Syu tradingview
This will combine the system update and installation of tradingview together.
As far as snap being evil, it’s not, really. It’s more a matter of there being two current standards for distribution agnostic software and one of them(Flatpak) appears to have much more traction than the other(Snap). So many consider Snap to be an unnecessary fragmentation that Canonical(creators of Ubuntu) is pushing because… well, if the cynic in me had to guess it would be that Flatpak could be threatening to the .deb ecosystem which, as you can see with TradingView, is where more software developers turn to first when offering official Linux software. A big one that comes to mind is Spotify.
I’m just spitballing here as my software needs are almost completely taken care of in the pacman ecosystem so I don’t have any skin in this game. Hopefully that helps with explaining the occasional community hate you’ll come across though.
Technically speaking, there’s no evil in using Snaps so if you can’t completely satisfy your needs inside Arch then a Snap could be an option. I personally have it pretty far down on my list after pacman, AUR, and Flatpak have already been checked and have never been forced to resort to it.
Dirge and others, thank you. This was the solution. It took me a bit to realize that I needed to hit “q” at the end of the inspection process to achieve the actual install, but this is all it took. Cachy_OS is my first interaction with Arch-based anything. I appreciate your kind and patient assistance!