On November 19, the Nifty 50 closed at 23,519, rebounding from a seven-day decline, while the Bank Nifty rose to 50,627. Key levels to watch include 23,800 for Nifty, which could lead to a rally towards 24,000–24,500, and 51,000 for Bank Nifty, with potential movement towards 51,500–52,000.