Do you have?
I saw a trader with 6, 4 in the bottom row, 2 above the center 2. I don't know if that is really necessary, but I am sure it is. I googled and found some peoples with 8-24 screens. What the heck do you do with the 18+ screens when you can only stare at 6 at a time?
Using all of your knowledge and whatnot, please provide an estimate of the optimal number of monitors needed for a day trader, say at top tier. Use models, equations, , guesswork, or asking your little brother. That's how the real traders do it on Wall Street.