by Adam ⌂ @, New York, Friday, November 23, 2018, 00:12 (206 days ago) @ DouglasCar

Whereabouts are you from? Open outcry dominated futures trading for decades after the CBOT created the world's first futures exchange in 1848. Chicago's pit-style trading eventually developed its own non-verbal argot: a palm facing toward the body indicates a buyer, and a palm away from the body represents a seller. From banks of phones on the edge of the pits, traders used intricate hand gestures to signal the volume and price of contracts to floor brokers.

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