I run 3 - 19s for my charts. I use a 4th for brokers / news, which is currently off to the side. Having it off to the side is a pain getting mouse over to it. I plan to relocate it above the center screen (pyramid formation) in near future.Quote from redline:
Daytrading. Monitors made up of ~4 DOM's & Charts.
I've been using 4 horizontal and am not too happy with the setup. Iam leaning towards 3 horizontal and one on top (centre)