一个关于ATR的指标的翻译，高手帮忙下

2011-12-30 · 10545 阅读

从网站上下载了一个关于ATR的指标，有代码，但看不明白指标设计原理，请高手详细翻译一下，谢谢了
  //+------------------------------------------------------------------+
  //|                                              NRTR_ATR_STOP.mq4 |

  #property indicator_chart_window
  #property indicator_buffers  2
  #property indicator_color1 Blue
  #property indicator_color2 Red
  //----
  extern int ATR = 20;
  extern int Coeficient = 2;
  //----
  double Up[], Dn[];
  string MODE;
  bool first;
  //+------------------------------------------------------------------+
  //| Custom indicator initialization function                      |
  //+------------------------------------------------------------------+
  int init()
{
   SetIndexBuffer(0, Up);
   SetIndexStyle (0, DRAW_LINE, 0, 2);
   SetIndexEmptyValue(0, 0.0);
   SetIndexLabel (0, \"Up\");
  //----
   SetIndexBuffer(1, Dn);
   SetIndexStyle (1, DRAW_LINE, 0, 2);
   SetIndexEmptyValue(1, 0.0);
   SetIndexLabel (1, \"Dn\");
  //----
   first=true;
  //----
   return(0);
}
  //+------------------------------------------------------------------+
  //| Custom indicator deinitialization function                      |
  //+------------------------------------------------------------------+
  int deinit()
{
   first = true;
   return(0);
}
  //+------------------------------------------------------------------+
  //| Custom indicator iteration function                            |
  //+------------------------------------------------------------------+
  int start()
{
   int i, limit;
   double REZ, md;
   limit = Bars - ATR - 1;
  //----
   if(first)
   {
      md = 0;
      for(i = 0; i < limit; i++)
         md += iATR(NULL, 0, ATR, i);
      REZ = Coeficient*iATR(NULL, 0, ATR, limit);
      if(iATR(NULL, 0, ATR, limit) < md / limit)
         {
         Up[limit+1] = Low[limit+1] - REZ;
         MODE = \"UP\";
         }
      if(iATR(NULL, 0, ATR, limit) > md / limit)
         {
         Dn[limit+1] = High[limit+1] + REZ;
         MODE = \"DN\";
         }
      first = false;
   }
  //----
   for(i = limit - 1; i >= 0; i--)
   {
      Dn = 0;
      Up = 0;
      REZ = Coeficient*iATR(NULL, 0, ATR, i);
      //----
      if(MODE == \"DN\" &&  Low[i+1] > Dn[i+1])
         {
         Up[i+1] = Low[i+1] - REZ;
         MODE = \"UP\";
         }
      //----
      if(MODE == \"UP\" && High[i+1] < Up[i+1])
         {
         Dn[i+1] = High[i+1] + REZ;
         MODE = \"DN\";
         }
      //----
      if(MODE==\"UP\")
         {
         if(Low[i+1] > Up[i+1] + REZ)
            {
               Up = Low[i+1] - REZ;
               Dn = 0;
            }
         else
            {
               Up = Up[i+1];
               Dn = 0;
            }
         }
      //----
      if(MODE==\"DN\")
         {
         if(High[i+1] < Dn[i+1] - REZ)
            {
               Dn = High[i+1] + REZ;
               Up = 0;
            }
         else
            {
               Dn = Dn[i+1];
               Up = 0;
            }
         }
   }
   return(0);
}
  //+------------------------------------------------------------------+