Benchmark indices opened with a gap-up on Wednesday and initially extended their gains, but the momentum failed to sustain, with selling pressure emerging as the session progressed. The indices subsequently traded lower through the day, giving up their early gains and closing in negative territory amid higher crude prices as Brent crude moved above $110. On the higher side, analysts say key level to watch is Monday's high of 23,175, only a move above the same will signal pullback towards 23,300 and 23,500 levels in the coming sessions being the 50% retracement of the entire recent decline from 24,774 to 22,180.STATE OF THE MARKETSGIFT Nifty (Earlier SGX Nifty) signals a negative startGIFT Nifty on the NSE IX traded lower by 38.5 points, or 0.17 per cent, at 22,690, signaling that Dalal Street was headed for a negative start on Thursday.Tech View: A cautious stance is advisable, with 22,650–22,700 acting as a crucial support zone around the 200-WMA.