INDIAVIX and Natenberg

INDIAVIX closed at 33.35 on 21 April 2014. The implied volatility for 6800 call was at 31.51 when the NIFTY is at 6815. Natenberg would say to sell option outside the money. I expect the volatility to drop to 20. The trade is
SELL 7300 CALL @ 103

SELL 6400 PUT  @ 105

NIFTY can move between 6200 and 7500 without a loss.