I did try this once and had a good outcome for two days only.I was really happy thinking that I have done some real great stuff, everyday I shall get about 1000 Rs using this stratergy. The next day, both the stocks went the other direction and had to cut my losses. -- the stocks were of high volatilty.
One thing that I thought that can be tried -- in a market uptread -- go long in the stock which has high beta and go short in the stock which has low beta. (so the hedge here will be less)
Still need to test more on these, but again as mentioned, there will not be great profits here, as one acts as a hedge to the other.