An Introduction to Hand Signals
Below are some of the hand signals used for successful trading in the Chicago Mercantile Exchange pits. For more examples of this unusual sign language, check out the interactive lessons on CME's Web site.
Buy / Sell
When indicating you want an offer to buy (signaling a bid), the palm of the hand always faces toward you. You can remember this by thinking that when you're buying, you're bringing something in toward you. When making an offer to sell (offering), the palm always faces away from you. Think of selling as pushing something away from you.
To indicate quantity - the number of contracts being bid or offered - touch your face.
To signal quantities one through nine, touch your chin.
To show quantities in multiples of 10, touch the forehead.
To show quantities in multiples of 100, make a fist and touch the forehead.