说明：  量化 交易 代码 实例程序21，基于wind数据和matlab计算平台。是学习量化投资和程序化交易的很好的例子。安装wind软件和matlab后可编译执行。
(Quantitative trading code, based on wind data and MATLAB computing platform. It is a good example of learning quantitative investment and procedural trading. After installing windows software and matlab, it can be compiled and executed.)