MTECHTIPS- Copper trading range for the day is 309.2-313.2. Copper prices dropped to the third weekly fa ll amid persistent signs of oversupply in the market. China’s exports of unwrought copper soared 121 percent in September from a year earlier to 27,848 tonnes, data showed. China’s refined copper production jumped 7.2 percent in September from a year ago, data from the National Bureau of Statistics showed. SELL COPPER NOV @ 313.00 SL 315.20 TGT 310.00-307.60. MCX.