Don Kaufman here. 

I literally bought four different monitors on Amazon. Just one of each. Opened them up in my Arizona mountain house and let my kid loose on them.

"This KTC thing absolutely smokes your old monitor, Dad."

When a 13-year-old who plays Fortnite on a multi-monitor setup tells you a $97 monitor destroys your expensive Dell, you listen.

Here's what I've learned building three trading setups over the years: The most expensive components aren't always the best ones. 

And sometimes your best tech advisor is the person who stares at screens longer than you do.