Benchmark indices witnessed a volatile session on Wednesday, with profit booking emerging, as investors turned cautious ahead of key US inflation data. Sentiment received some support from easing intraday Brent crude oil prices and rupee appreciation, although these factors were insufficient to sustain the recovery. On the higher side, analysts say index needs to start forming higher high and higher low on a sustained basis in the weekly chart and reclaim 23,100 levels being the recent breakdown area to signal a pause in the last 2 months sharp decline.