​Chart patterns suggest that the zone of 18,900-18,950 for the Nifty will be strong support going forward. Until the index sustains above the level of 18,900, we may witness the continuation of this strong momentum up to the level of 19,450-19,500. However, if the index slips below 18,900, profit booking up to 18,650-18,500 could be witnessed. Options data suggest a broader trading range of 18,900-19,500 for the upcoming week.