Can emacs finance?
Can it daytrade?
Can it finance?
ledger-mode is worth checking out
ledger-mode
That depends on what you want to do, and how you define "can it". If your exchange has an API, you could build something that calls that API and shows the results in emacs. It is, in its core, a programmable TUI, after all.
Edit: TUI as in Textual User Interface.