SIMEX
Technique
Thumb, index, and middle fingers are extended while pinky and ring finger is closed.
Origin
Firm's clearing number was 007 so it's the James Bond pose as the fingers are supposed to mimic a gun
Brokerage - Wardley James Capel
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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