主题：array / minuteData 的问题，

function simpletest( )

    dim d
    dim i
    dim x
    dim period
    period = 30
    set MinuteData = marketdata.GetMinuteData( "ZN10", "SQ" )
    Set d = CreateObject("Stock.Array")
   
    if MinuteData.count > period then
        for i =0 to period -1 step 1
            x = minutedata.newprice(i)
            d.addback( x )
        next
    end if
    
    simpletest= d.forcast
    
    msgbox simpletest

end function

我的问题是为什么d.forcast不随着时间的变化而变化哪？