Even though trading floors and exchanges have largely been replaced by server rooms filled with boxes of computer parts, there are still some places in the world where the movement of money or commodities is governed by people who can yell the loudest. Welcome to the world of outcry pit trading, a place that redefines “hand to hand” combat. While few in number, some of the exchanges, such as the Chicago Mercantile Exchange (CME) are among the world’s most influential centers of trading. We found this fun infographic explaining the incredible sign language used by pit traders (a style of trader communication mentioned by AJ Monte at the Scotia iTrade Education Summit) to move around billions of dollars worth of stuff. Also, if you’re interested in learning more about this type of trading, check out a neat blog dedicated to hand signals and pit trading.