BSE benchmark Sensex gained over 32 points in early trade today .The 30-share barometer, which had gained over 188 points in the previous two sessions, added 32.17 points, or 0.17 per cent, to 18,550. with stocks of power, capital goods, metal and oil and gas sectors extending support.Similarly, the wide-based National Stock Exchange index Nifty moved up by 6.80 points, or 0.12 per cent, to 5,635. .