Benchmark index Nifty was in firm bearish grip amid volatility on October 22 due to rising crude prices. At 12:19 am, the Sensex was down 631.33 points or 0.86% at 73,078.36, and the Nifty was down 221.95 points or 0.97% at 22,589.40. About 1,191 shares advanced, 2,584 shares declined, and 173 shares were unchanged. Nifty's day's low was 22,554.85. Where are markets headed? "Nifty has support at 22,500-22,400 levels being the 80% retracement of the last two weeks pullback 22,180-23,175.