Indian benchmark indices were trading with mild gains on Wednesday. The BSE Sensex gained over 60 points or 0.1% to trade at 62,746.The NSE Nifty is trading at 18,649, up 0.17% after opening in the red. Sectorally, Nifty Metal is over 1.3% up, Nifty Auto is 0.7% higher while Nifty…