Nifty on Thursday ended 46 points lower to form a small green candle with an upper shadow on the daily chart and signalled buying interest at lower levels. Put writers were seen strengthening their position at 19,500 strike. If the index weakens further, it can find support around 19480-19450 levels and any upside bounce from here could encounter resistance around 19700 levels, said Nagaraj Shetti, Technical Research Analyst, HDFC Securities.