High-intensity trading strategies usually involve opening deals and holding them for very short periods, sometimes up to a few seconds. Computers dedicated to this style of trading are linked directly with the market to receive the flow of data and execute orders. They are also linked with credit lines of major banks. The expenses of these transactions are negotiated. Also, the difference between the bid and ask prices is less than what any individual trader can find. Of course, such a very fast trading style is suitable only for major players in financial markets such as investment funds and institutional traders.