After a recent rally, the Nifty index closed at a record high above 19,300 levels and has been consistently making higher highs and higher lows. Analysts suggest that the index needs to hold above the 19,250 zone to continue its upward movement towards the 19,400 and 19,500 zones. On the downside, support is seen at 19,100 and 19,000 levels. Traders should be cautious about potential profit booking due to temporary overbought conditions. Bank Nifty is also expected to continue its upward momentum with a target of 45,500 levels.