With no major positive trigger to take nifty past 8000 ( at the moment ) I think shorting is the only way to go till 7970 is taken out on spot. Somehow dont see that happening. Somehow i see a lot of call writing happening at every upmove. Could also mean that these upmoves are being used to enter short positions before a major down move.
This is just my point of view. Im far from a successful trader so please dont think that nifty will go down or im saying this because im short. These are just my views. I would love to be corrected and learn in the process.