No. Intra Day trading is not allowed in Shariah as you do not get delivery of stocks in a day. It is not permissible to sell a security to which the seller does not hold legal title or over which he cannot exercise effective control. However, there are exceptions to this rule. In case the investor already holds delivery of a certain number of shares of a particular scrip and also has enough cash with him to buy those shares, he can either first buy and then sell or first sell and then buy, the same number of shares of that scrip on the same day.