http://www.economist.com/businessfinance/PrinterFriendly.cfm?story_id=14649248
A new device to prevent irrational online trades

JUST before the hovering finger clicks the mouse to trade, there is one thing that online investors of the future might want to check: their “Rationalizer”. The device, a prototype of which was unveiled this week, is an emotion-sensing system designed to help investors keep a cool head when buying and selling.