MTECHTIPS- Gold trading range for the day is 30780-31126. Gold prices dropped as the dollar firmed and investors assessed Federal Reserve Chair Janet Yellen’s testimony before a Congressional committee. The Fed is considering changing the annual stress tests it gives to U.S. banks to see if they can withstand a massive financial crisis, Yellen said. The Fed’s chair did not comment on the outlook for the economy or monetary policy in her prepared remarks. SELL GOLD OCT @ 31100 SL 31380 TGT 30920-30750. MCX.