Maintaining the upward trend, the Sensex at the Bombay Stock Exchange was trading 61 points in the positive territory at 19,752, in afternoon deals, when reports last came in. The 30-share barometer had opened 66 points in the green today, on selective buying by funds, amid an improving trend on other Asian bourses. It had lost over 430 points in yesterday's session.The Nifty at the National Stock Exchange was trading 32 points up at 6,013.