关于使用MT5进行跨周期时，ima无法获取跨周期信息的问题

[FreshBird]

使用以下代码，当TimeFrame不为当前周期时，例如当前周期为30M，但是TimeFrame取值不为30M的时候，后面调试起来slow2的值全部为0，这是为什么呢？

//+------------------------------------------------------------------+

//|                                                  cross cycle.mq5 |

//|                                  Copyright 2022, MetaQuotes Ltd. |

//|                                             https://www.mql5.com |

//+------------------------------------------------------------------+

#property copyright "Copyright 2022, MetaQuotes Ltd."

#property link      "https://www.mql5.com"

#property version   "1.00"

#property indicator_chart_window

#property indicator_buffers 2

#property indicator_plots   2

//--- plot slow

#property indicator_label1  "slow"

#property indicator_type1   DRAW_LINE

#property indicator_color1  clrRed

#property indicator_style1  STYLE_SOLID

#property indicator_width1  1

//--- plot fast

#property indicator_label2  "fast"

#property indicator_type2   DRAW_LINE

#property indicator_color2  clrYellow

#property indicator_style2  STYLE_SOLID

#property indicator_width2  1

//--- input parameters

input ENUM_TIMEFRAMES TimeFrame = PERIOD_H1;

input int      slow=5;

input int      fast=15;

input int      K线根数=3000;

//--- indicator buffers

double         slowBuffer[];

double         fastBuffer[];

int slow_h;

int fast_h;

//+------------------------------------------------------------------+

//| Custom indicator initialization function                         |

//+------------------------------------------------------------------+

int OnInit()

  {

//--- indicator buffers mapping

   slow_h = iMA(NULL,TimeFrame,slow,0,0,PRICE_CLOSE);      //将大周期的MA存入

   fast_h = iMA(NULL,TimeFrame,fast,0,0,PRICE_CLOSE);     //存在Bug，跨周期数据无法获取

   ArraySetAsSeries(slowBuffer,true);

   ArraySetAsSeries(fastBuffer,true);

   SetIndexBuffer(0,slowBuffer,INDICATOR_DATA);

   SetIndexBuffer(1,fastBuffer,INDICATOR_DATA);

//---

   return(INIT_SUCCEEDED);

  }

//+------------------------------------------------------------------+

//| Custom indicator iteration function                              |

//+------------------------------------------------------------------+

int OnCalculate(const int rates_total,

                const int prev_calculated,

                const datetime &time[],

                const double &open[],

                const double &high[],

                const double &low[],

                const double &close[],

                const long &tick_volume[],

                const long &volume[],

                const int &spread[])

  {

//---

//--- return value of prev_calculated for next call

   double slow2[];

   ArraySetAsSeries(slow2,true);

   CopyBuffer(slow_h,0,0,rates_total,slow2);

   double fast2[];

   ArraySetAsSeries(fast2,true);

   CopyBuffer(fast_h,0,0,rates_total,fast2);

   datetime timeda[];

   ArraySetAsSeries(timeda,true);

   CopyTime(NULL,TimeFrame,0,rates_total,timeda);

   ArraySetAsSeries(time,true);

   

   int y = 0;

   for(int i=0; i < K线根数; i++)

     {

     

         if(time[i]<timeda[y]) y++;    //根据大小周期的时间来对K线进行对应

         slowBuffer[i] = slow2[y];

         fastBuffer[i] = fast2[y];

         

     }

   int bbb = 1;

   return(rates_total);

  }

//+------------------------------------------------------------------+