这个指标我想改成邮件报警，我改后报了3个错，有劳大神帮我看看，我刚学写指标

wangjia

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

//|                                                     Gimmebar.mq4 |

//| See Joe Ross Trading Manual on Gimme-Bars (e.g. from the         |

//| library on www.trading-naked.com)  

//|Bolllitouch - yet another perky mod                                |

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

#property  copyright "by Shimodax, 2005"

#property  link      "http://www.strategybuilder.com"


//---- indicator settings

#property  indicator_chart_window

#property  indicator_buffers 6

#property  indicator_color1  SlateBlue

#property  indicator_color2  SlateBlue

#property  indicator_color3  Pink

#property  indicator_color4  LightBlue

#property  indicator_color5  Pink

#property  indicator_color6  LightBlue


//---- indicator parameters

extern int BobaPeriod= 20;

extern double BobaDeviations= 2;


//---- indicator buffers

double     BufferBand1[];

double     BufferBand2[];

double     BufferSell[];

double     BufferBuy[];

double     BufferSellEntry[];

double     BufferBuyEntry[];


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

//|                                                                  |

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

int init()

{

   //---- 2 additional buffers are used for counting.


   IndicatorDigits(MarketInfo(Symbol(),MODE_DIGITS)+2);


   // two bollies

   SetIndexBuffer(0,BufferBand1);

   SetIndexStyle(0,DRAW_LINE);

   SetIndexDrawBegin(0,BobaPeriod);


   SetIndexBuffer(1,BufferBand2);

   SetIndexStyle(1,DRAW_LINE);

   SetIndexDrawBegin(1,BobaPeriod);


   // marks for gimmees

   SetIndexBuffer(2,BufferSell);

   SetIndexStyle(2,DRAW_ARROW);

   SetIndexDrawBegin(2,BobaPeriod);

   SetIndexArrow(2, 167);

   SetIndexEmptyValue(2, 0);


   SetIndexBuffer(3,BufferBuy);  

   SetIndexStyle(3,DRAW_ARROW);

   SetIndexDrawBegin(3,BobaPeriod);

   SetIndexArrow(3, 167);

   SetIndexEmptyValue(3, 0);


   // marks for entries

   SetIndexBuffer(4,BufferSellEntry);

   SetIndexStyle(4,DRAW_ARROW);

   SetIndexDrawBegin(4,BobaPeriod);

   SetIndexArrow(4, 238);

   SetIndexEmptyValue(4, 0);


   SetIndexBuffer(5,BufferBuyEntry);  

   SetIndexStyle(5,DRAW_ARROW);

   SetIndexDrawBegin(5,BobaPeriod);

   SetIndexArrow(5, 236);

   SetIndexEmptyValue(5, 0);


   //---- name for DataWindow and indicator subwindow label

   // IndicatorShortName("GimmeBar ");


   //---- initialization done

   return(0);

}


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

//| Custom indicator iteration function                              |

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

int start()

{

   int counted_bars= IndicatorCounted(),

         lastbar;


   if (counted_bars>0)

      counted_bars--;


   lastbar= Bars - counted_bars;


   GimmeeBar(0, lastbar, BufferSell, BufferBuy, BufferSellEntry, BufferBuyEntry, BufferBand1, BufferBand2, BobaPeriod, BobaDeviations);


   return (0);

}   


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

//| Mark Gimmee-Bars and mark possible entries for deals              |

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

double GimmeeBar(int offset, int lastbar, double &sellbuf[], double &buybuf[], double &sellbuf2[], double &buybuf2[],

                  double &band1buf[], double&band2buf[], int period, int deviation)

{

   double band1, band2;

   int markerdist= 5;   // distance between bars and marker dots


   lastbar= MathMin(Bars-period, lastbar);   


   //---- main loop

   for(int i= lastbar; i>=offset; i--){


      sellbuf= 0;

      buybuf=0;

      sellbuf2= 0;

      buybuf2=0;


      band1= iCustom(Symbol(),0,"Bands",BobaPeriod,0,BobaDeviations,1,i);

      band2= iCustom(Symbol(),0,"Bands",BobaPeriod,0,BobaDeviations,2,i);


      band1buf= band1;

      band2buf= band2;


      // 1. Prices were rising.

      // 2. Prices touched the upper band.

      // 3. The price bar closed lower than it

      // opened when prices were previously rising.

      // or vice versa


      if (High>=band1)  {

         sellbuf= High + markerdist*Point;

         if (i < 2 )

       

        {

          

                SendMail("boll touch at top","boll signal")

        }

      }


      if (Low<=band2)  {

         buybuf= Low - markerdist*Point;

         if (i < 2 )

       

        {

          

                SendMail("boll touch at bottom","boll signal")

        }


      }


      // Should such a price bar occur, a sell short order is to be executed

      // one tick below the low of the Gimmee bar.


     // if (sellbuf[i+1]!=0 && Low<Low[i+1]-1*Point) {

      //   sellbuf2= Low[i+1]-1*Point;

     // }


     // if (buybuf[i+1]!=0 && High>High[i+1]+1*Point) {

     //    buybuf2= High[i+1]+1*Point;

     // }


   }


   /*

   if (DebugLogger)

      Print(TimeOffset(offset), "BG-GimmeBar ", "");

   */


   return (0);

}