This is just a speculation and not proven theory. I m seeing some trend quite consistently and based on my theory (yet to be verified)
Buy stocks on Monday/Tuesday. Sell it on Thursday evening or Friday Morning. Market will certainly go down on Friday afternoon. (take care in case Friday is holiday). This gives you some quick bucks.
I advise readers to trade at their own risk and this applies only in Indian stock exchanges (NSE/BSE). Hope, many of you know that I m not a qualified stock analyst :-)
But if you made some bucks, you have to strictly give me some royalty.