Price was very volatile yesterday and we were getting narrow movement for the past few days. Price have to sustain 18420 - 18440 to continue the uptrend. If it faces resistance at 18440 the price will move towards 18380, 18320. Bulls have upper hand as long as price is above 18280. Expiry day range is 18300 - 18450. Whenever there is a spike in price, mind will say buy or sell, but you have to follow your trade setup. Volatile expiry day is expected.