新人MQL5学习中,代码每次运行的结果 都不一样

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Jinhua Wu
16
Jinhua Wu  

新人MQL5学习中,代码每次运行的结果 都不一样,

画了三条线, 有时间一条线, 有时间两条线 有时没得线..


//#property indicator_separate_window                 // 单独绘图窗口
#property indicator_chart_window
//#property indicator_minimum -100                    // 窗口最小轴
//#property indicator_maximum 100                     // 窗口最大轴
#property indicator_buffers 6                       // 一共有几个缓存数组
#property indicator_plots   3                       // 几种图形

//--- plot Line
#property indicator_label1  "Line"
#property indicator_type1   DRAW_COLOR_LINE
#property indicator_color1  clrWhite
#property indicator_style1  STYLE_SOLID
#property indicator_width1  1
double                      LineBuffer[];           // 绘制线的缓存区
double                      LineColorsBuffer[];

//--- plot lineTwo
#property indicator_label2  "LineTwo"
#property indicator_type2   DRAW_COLOR_LINE
#property indicator_color2  clrWhite
#property indicator_style2  STYLE_SOLID
#property indicator_width2  1
double                      LineTwoBuffer[];
double                      LineTwoColorsBuffer[];

//--- plot lineThe
#property indicator_label3  "LineThe"
#property indicator_type3   DRAW_COLOR_LINE
#property indicator_color3  clrWhite
#property indicator_style3  STYLE_SOLID
#property indicator_width3  1
double                      LineTheBuffer[];
double                      LineTheColorBuffer[];


//--- input parameters
input int                   InpFastMa           = 5;            // Fast ma perid
input int                   InpSlowMa           = 10;           // Slow ma perid
input int                   InpLongMa           = 20;           // Long ma perid
input ENUM_APPLIED_PRICE    InpAppliedPrice     = PRICE_CLOSE;  // Applied price
//--- Ma handles
int                         ExtFastMaHandle;
int                         ExtSlowMaHandle;
int                         ExtLongMaHandle;

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping
    SetIndexBuffer( 0, LineBuffer, INDICATOR_DATA );
    SetIndexBuffer( 1, LineColorsBuffer, INDICATOR_COLOR_INDEX );
   
    SetIndexBuffer( 2, LineTwoBuffer, INDICATOR_DATA );
    SetIndexBuffer( 3, LineTwoColorsBuffer, INDICATOR_COLOR_INDEX );
   
    SetIndexBuffer( 4, LineTheBuffer, INDICATOR_DATA );
    SetIndexBuffer( 5, LineTheColorBuffer, INDICATOR_COLOR_INDEX );
   
    ExtFastMaHandle = iMA( NULL, 0, InpFastMa, 0, MODE_EMA, InpAppliedPrice );
    ExtSlowMaHandle = iMA( NULL, 0, InpSlowMa, 0, MODE_EMA, InpAppliedPrice );
    ExtLongMaHandle = iMA( NULL, 0, InpLongMa, 0, MODE_EMA, InpAppliedPrice );
   
//-- 返回访问数组时间[] - 像时间序列一样
    //ArraySetAsSeries( LineBuffer, true );
//---
   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[])
  {

//--- check for data
    if( InpFastMa > rates_total ){
        return( 0 );
    }

    int _calculated = 0;
    _calculated = BarsCalculated( ExtFastMaHandle );
    if( _calculated <= 0 ){
  Print("Not all data of ExtFastMaHandle is calculated (",_calculated,"bars ). Error",GetLastError());
  return(0);
 }
 
    _calculated = BarsCalculated( ExtSlowMaHandle );
    if( _calculated <= 0 ){
  Print("Not all data of ExtSlowMaHandle is calculated (",_calculated,"bars ). Error",GetLastError());
  return(0);
 }
 
    _calculated = BarsCalculated( ExtLongMaHandle );
    if( _calculated <= 0 ){
  Print("Not all data of ExtLongMaHandle is calculated (",_calculated,"bars ). Error",GetLastError());
  return(0);
 }
 
//--- we can copy net all data
    PrintFormat( "prev_calculated == %d, rates_total == %d ", prev_calculated, rates_total );
 int _to_copy;
 if( prev_calculated > rates_total || prev_calculated < 0 ){
  _to_copy = rates_total;
 } else {
  _to_copy = rates_total - prev_calculated;
  if( prev_calculated > 0 ){
   _to_copy++;
  }
 }
 
 Print( "_to_copy === ", _to_copy );
 
//--- get Fast EMA buffer
    if( IsStopped() ){
        Print( "Check is Stopped " + __FILE__ + __LINE__ );
        return(0);
    }
   
    if( CopyBuffer( ExtFastMaHandle, 0, 0, rates_total, LineBuffer ) < 0 ){
        Print("Getting     FAST EMA   is failed! Error", GetLastError());
  return(0);
    }
    if( CopyBuffer( ExtSlowMaHandle, 0, 0, rates_total, LineTwoBuffer ) < 0 ){
        Print("Getting     Slow EMA   is failed! Error", GetLastError());
  return(0);
    }

    if( CopyBuffer( ExtLongMaHandle, 0, 0, rates_total, LineTheBuffer ) < 0 ){
        Print("Getting     Long  EMA   is failed! Error", GetLastError());
  return(0);
    }
   
//---
    int _limit =( prev_calculated > 0 ) ? 1 : ( prev_calculated - 1 );
    Print( " calu _limit scope /'_limit == /' %d ", _limit );

 
//--- return value of prev_calculated for next call
   return(rates_total);
  }
 
1

Sergey Golubev
版主
116166
Sergey Golubev  

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