Nifty50 extended its losses for the fourth consecutive session and closed at 23,951 on Thursday. Taking cues from the global market, the index started the day with a gap-down opening at 23,877.15 and traded sideways in a narrow range of 24,870.30-24,004.90. According to O'Neil's methodology of market direction, the index has been downgraded to an ‘uptrend under pressure’ as Nifty …