Squaring off is a trading style used by investors/traders mostly in day trading, in which a trader buy or sell a particular quantity of stocks and later in the day reverses the transaction, in the hope of earning a profit .
Intraday square off:
Intraday trading is the trading system where you have to square-off your trade on the same day. Squaring off the trade means that you have to do the buy and sell or sell and buy transaction on the same day before the market closes. Intraday Trading is also referred to as Day trading by many traders.
Deliver square off:
Delivery is a trading style in which a trader buys a stock and holds it for a period of time and waits for a right time to sell the stock to make good profit.