These are the bandwidth you needed for the first 3 hours trading the ES. Unfortunatelly I made the first screenshot just to late so you don't see the startup of NT8.
Opening NT8 needed 200Kbs.
From opening till a few minutes ago you never needed even 50Kbs download. Upload is even smaller.
You see how the Kbs go lower after the big volume at the opening.
That's great, Virtusa. Thank you.

Did you do any such tests during more volatile/high volume periods? Would that change things?
I did some test trading yesterday and followed the entire session with my left eye. Didn't experience any issues.