Go on eBay and get a cheap PCI-E dual output video card and get another AGP/PCI (whichever your motherboard supports) dual output card.
These are dirt cheap these days since you are not using the cards for some hardcore gaming.
With this setup you should be able to get up to 5 monitors. One onboard motherboard video card, 2 from the PCI-E, and 2 from the AGP/PCI video card.
Then try to get some 19" or larger widescreen monitors. I wouldn't even buy these new you can get some dirt cheap if they are VGA only.
Then either buy or build a vertical mount like on
http://www.overclock.net/other-hardware ... stand.html
You don't need a vertical mount but you can get a better aspect ratio of your charts when viewing them. For example with a 19" widescreen monitor mounted vertically you can view 3 charts on MT4 perfectly. If you try to view the charts horizontally, it will stretch and not look as clear. This is just the case for myself.
This should run you a couple hundred bucks, the setup you posted in your picture is what is used by hedge funds and that will cost you thousands.