CME
Technique
Closed fist at arms length moving from side to side with a slight arc. Click on "How-to" button above for illustration.
Origin
Driving the steering wheel of a car.
Brokerage - Carr
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The ability to recognize all market participants was what made open outcry trading transparent and from this, signals were developed for the larger brokerages and for some large local traders. In cases where a more universal signal was never developed, their hand signal in the pit would simply be their three digit firm number