If you have only one screen, will you use widescreen or regular? If you have a 2 screens, which setup will you use? two regular side by side or 2 wides top and bottom? If you have 4 screens, will you use wide or regular? The problem is really, when you watch/scan, work on one trade and use the eye's edge to monitor another stock. Are you more comfortable watching one point, or moving eyes around? For me, I have eye glasses. It is difficult for me to see to move eyes, so I have to move heads. So I preffer regular screens, so without moving, my eyes can cover more spaces.