Hand extended and moves back and forth at wrist, palms up and down
Asking what the current market price is, by showing palms up and down it refers to both sides of the market
Numerical hand signals are generally constant throughout all trading floors but slight variations are made with figures greater than 99. Price is displayed away from the body and the quantity is displayed close to the face. Generally price is displayed before quantity ("price on quantity") to buy and it's the opposite to sell ("quantity at price"). When contracts are quoted in increments of 10ths, generally the signals used will be 1-9 and rather than increments of 10s.