Order flow is the amount of a transaction that has been signed and agreed upon by both parties. It is being traded at the market value is said to be the buyer-initiated (i.e. positive) as well as the seller-initiated at just the bid price (i.e. negative). Market orders and marketable limit orders are in fact the most common method of initiating and executing contracts. The liquidity provided by traders and market makers is absorbed immediately by these transactions. Liquidity is said to be provided by traders who send restricted orders, which are posted in an electronic limited order book. As long as the electronic market is available for trading, the acquisition and also the selling of orders flow into another accompanying exchange system.