Web Framework for PYthon that is most suitable for stock trading app [on hold]

i know this is like asked many times and its highly personal choice, but still like some opinions for specific needs. I trying to build a securities trading kind of app, meaning 1) Real time price and trend data that has to be reflected in table format 2) Real time data required for graphs 3) a lot of data within a single screen (data-heavy)

i have tried flask briefly but i struggle even to have a table to enter data like Excel.

my question is which is simplest framework with such features? (if you wonder why python, because i build the backend statistically modelling with python)