The Indian equity benchmarks were trading in a narrow range on Wednesday as gains in Infosys, ITC, HCL Technologies, IndusInd Bank and HDFC Bank were offset with losses in ICICI Bank, Power Grid, Bharti Airtel, TCS and Tech Mahindra. The Sensex was trading in a range 335 points and Nifty 50 index touched an intraday high of 18,296 and low of 18,183.