As per 9-3-2009 trading: Addition of OI in nifty futures 5.47 lakhs in March and 4.78 lakhs in April, the view is –ve.
2600 call 18 lakhs, upper level restricted up to 2650.
2400 puts 11.6 lakhs lower level limited to 2370.
Huge OI writing in April 2500 puts 11 lakhs, 2400 puts 5.7 lakhs.

Nifty levels as per sliding parallel channel the bottom may be at 2470 and to take a temporary bounce. Other wise Fibonacci retracement will also come to the level nifty 2470 and the bounce may be up to 2580-2590.

Hence, the down fall in this swing may end at nifty 2470-2370 and bounce will end at 2570-2590. One may plan to take reverse positions as per first swing of market in the coming two trading days for huge profits.
Buy 2600 calls if nifty is at 2470 and reverses.
Else buy 2400 puts if market is at 2570-2600.