Normal order (NRML order) is a type of Equity order where one can buy the stocks either by paying the amount which is equivalent to the Price of the stock in the form of cash or collateral i.e. by creating limit against the shares lying in your demat and ensuring successful pledging of such stocks.
Stocks bought under NRML against the collateral margin can be held for T+5 days, payment for which needs to be made in Cash within T+5 days, failure to this will lead to liquidation of the stocks against which the NRML position was created. Liquidation will be to the extent of the value of stocks bought under NRML.