21800 to 21840 is zone which is proving to be strong resistance.

Another Dangerous Doji formed today. If yesterday's Doji candle was indecisive, today's Doji was little negative in nature as the closing was substantially low compared to where the index was before just an hour or 2 before closing. Mainly the news of Earthquake in Japan and the magnitude of destruction could be one of the reason of sudden weakness. Support for Nifty will be at 21682, 21471 and 21242. Resistance on the upper side for Nifty will be at 21802 and 21840. Crossing and closing above 21840 can give Nifty a free run towards 21900 or even 22000. But indecisiveness is causing a negative shadow.