"19500 has become strong resistance for Nifty, and unless that is taken out, traders should remain cautious. Support for the Nifty is seen in the 18900-19000 band. Bank Nifty ended the week with a bearish “Shooting star” candlestick pattern on the weekly chart, a short-term bearish trend reversal pattern,” said Devarsh Vakil, Deputy Head - Retail Research, HDFC Securities.