Generally,market remain calm before the announcement and become volatile after RBI's announcement,a very risky day to trade.
Technically on chart:
Nifty remain sideways for 2 days in between 20960 and 20850.
For UPSIDE. If open above 20920 and breaks 20940/60 upside and sustain it then then 21096 can be seen upside
For DOWNSIDE: If open in between the day's range and breaks below 20850, have to be cautious as 20805,20785,20771 are support levels. If 20785/20771 is broken down ,then intraday move to 20611 can be seen downside provided that 20712 is also broken down