According to an analyst, Nifty has the next critical support at 14,100 levels. In case of a rebound, the 14,500-14,650 zone would act as a hurdle. Image: Reuters Nifty futures were trading 32 points or 0.22 per cent up at 14,391 on Singaporean Exchange on Tuesday, suggesting a gap-up opening for BSE Sensex and Nifty