The average time a stock is held is 22 seconds, as computerized high-speedtrading accounts for most transactions, according to analysts at the University of Missouri.
The program trading utilizes high-speed, swift treatment ability of the computer and catches the instant change of the price in stock market, so that makes use of different price to obtain profits.
程序化交易利用计算机高速、快捷的处理能力，抓住股市上价格的瞬间变化，利用价差来获得利润。
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In last few years, increase along with the highspeed of international trading and of our country economy.