Actually, Matrox cards are actually some of the best multi-monitor cards made. I built my own computer system (quad-core) and researched multi-monitor cards and decided on the current Matrox card I have now. I actually can add one more monitor.
HOWEVER, a very successful hedge fund manager friend of mine told me to not use more than two monitors during trading (BTW, he's a big advocate of using StockCharts.com) I think he believes, from experience, that attention is diverted when there is too much for the eyes/brain to take in. It is common, though, for four monitor systems to be stacked -- two rows, but if I had to do it over again I would just buy a top performance dual monitor card. More is not always better, except when you are buying up shares of CDIV!
Oh, and I have the charts of Monk's sucky picks in the pictures. I also use ThinkOrSwim -- great platform!
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