Its not always the case you get profit from buying low and selling high, because of the charges. In that case what's the minimum buy sell difference to attain profit?
Buying low and selling high is always profitable when you sell the stocks for more than the break-even price. You break even when your profit is atleast 1 paise after all the tax deductions and brokerage. So you might want to rethink your strategy on how high you plan to sell.