double iStdDevOnArray( double array, int total, int ma_period, int ma_method, int ma_shift, int shift) Calculates the Standard Deviation counted on buffer and returns its value. Parameters: array - Array with data. total - The number of items to be counted. ma_period - MA period. ma_method - MA method. It can be any of Moving Average method enumeration value. ma_shift - iMA shift. 这是使用的参考, 我的疑问是,如果我们算一个macd里13天的的Std,那么,里面的total和ma_period有什么区别?