I have recently opened an account with Zerodha. I have understood some basic concepts of day trading but this 'Square Off' term is a little bit confusing for me. Till now I have been buying and selling commodities on the same day. But what if I was not able to sell the commodity once I bought it with in a day? Can I sell it other day or if I try to sell it other day do I have to square it off with another buy?