JBrainTrend1Stop_Alert - MetaTrader 5 的趋势警报指标

JBrainTrend1Stop 是一款功能强大的趋势指标，支持警报、邮件及推送通知。

为了实现这些功能，我们对指标代码进行了如下修改：

引入了新的输入参数：

input uint NumberofBar=1;// 信号的柱数
input bool SoundON=true; // 启用警报
input uint NumberofAlerts=2;// 警报数量
input bool EMailON=false; // 启用邮件信号
input bool PushON=false; // 启用移动设备推送

在指标代码末尾添加了三个新功能：BuySignal()、SellSignal() 和 GetStringTimeframe()
//+------------------------------------------------------------------+
//| 买入信号函数                                              |
//+------------------------------------------------------------------+
void BuySignal(string SignalSirname,      // 邮件和推送消息中的指标名称文本
               double &BuyArrow[],        // 向上趋势的信号缓冲区
               double &SellArrow[],       // 向下趋势的信号缓冲区
               const int Rates_total,     // 当前柱数
               const int Prev_calculated, // 上一刻的柱数
               const double &Close[],     // 收盘价
               const int &Spread[])       // 点差
  {
//---
   static uint counter=0;
   if(Rates_total!=Prev_calculated) counter=0;

   bool BuySignal=false;
   bool SeriesTest=ArrayGetAsSeries(BuyArrow);
   int index,index1;
   if(SeriesTest)
     {
      index=int(NumberofBar);
      index1=index+1;
     }
   else
     {
      index=Rates_total-int(NumberofBar)-1;
      index1=index-1;
     }
   if(SellArrow[index1] && SellArrow[index1]!=EMPTY_VALUE && BuyArrow[index] && BuyArrow[index]!=EMPTY_VALUE) BuySignal=true;
   if(BuySignal && counter<=NumberofAlerts)
     {
      counter++;
      MqlDateTime tm;
      TimeToStruct(TimeCurrent(),tm);
      string text=TimeToString(TimeCurrent(),TIME_DATE)+" "+string(tm.hour)+":"+string(tm.min);
      SeriesTest=ArrayGetAsSeries(Close);
      if(SeriesTest) index=int(NumberofBar);
      else index=Rates_total-int(NumberofBar)-1;
      double Ask=Close[index];
      double Bid=Close[index];
      SeriesTest=ArrayGetAsSeries(Spread);
      if(SeriesTest) index=int(NumberofBar);
      else index=Rates_total-int(NumberofBar)-1;
      Bid+=_Point*Spread[index];
      string sAsk=DoubleToString(Ask,_Digits);
      string sBid=DoubleToString(Bid,_Digits);
      string sPeriod=GetStringTimeframe(ChartPeriod());
      if(SoundON) Alert("买入信号 Ask=",Ask," Bid=",Bid," 当前时间=",text," Symbol=",Symbol()," Period=",sPeriod);
      if(EMailON) SendMail(SignalSirname+": 买入信号警报","买入信号在 Ask="+sAsk+", Bid="+sBid+", 日期="+text+" Symbol="+Symbol()+" Period="+sPeriod);
      if(PushON) SendNotification(SignalSirname+": 买入信号在 Ask="+sAsk+", Bid="+sBid+", 日期="+text+" Symbol="+Symbol()+" Period="+sPeriod);
     }
//---
  }
//+------------------------------------------------------------------+
//| 卖出信号函数                                              |
//+------------------------------------------------------------------+
void SellSignal(string SignalSirname,      // 邮件和推送消息中的指标名称文本
                double &SellArrow[],       // 向下趋势的信号缓冲区
                double &BuyArrow[],        // 向上趋势的信号缓冲区
                const int Rates_total,     // 当前柱数
                const int Prev_calculated, // 上一刻的柱数
                const double &Close[],     // 收盘价
                const int &Spread[])       // 点差
  {
//---
   static uint counter=0;
   if(Rates_total!=Prev_calculated) counter=0;

   bool SellSignal=false;
   bool SeriesTest=ArrayGetAsSeries(SellArrow);
   int index,index1;
   if(SeriesTest)
     {
      index=int(NumberofBar);
      index1=index+1;
     }
   else
     {
      index=Rates_total-int(NumberofBar)-1;
      index1=index-1;
     }
   if(BuyArrow[index1] && BuyArrow[index1]!=EMPTY_VALUE && SellArrow[index] && SellArrow[index]!=EMPTY_VALUE) SellSignal=true;
   if(SellSignal && counter<=NumberofAlerts)
     {
      counter++;
      MqlDateTime tm;
      TimeToStruct(TimeCurrent(),tm);
      string text=TimeToString(TimeCurrent(),TIME_DATE)+" "+string(tm.hour)+":"+string(tm.min);
      SeriesTest=ArrayGetAsSeries(Close);
      if(SeriesTest) index=int(NumberofBar);
      else index=Rates_total-int(NumberofBar)-1;
      double Ask=Close[index];
      double Bid=Close[index];
      SeriesTest=ArrayGetAsSeries(Spread);
      if(SeriesTest) index=int(NumberofBar);
      else index=Rates_total-int(NumberofBar)-1;
      Bid+=_Point*Spread[index];
      string sAsk=DoubleToString(Ask,_Digits);
      string sBid=DoubleToString(Bid,_Digits);
      string sPeriod=GetStringTimeframe(ChartPeriod());
      if(SoundON) Alert("卖出信号 Ask=",Ask," Bid=",Bid," 当前时间=",text," Symbol=",Symbol()," Period=",sPeriod);
      if(EMailON) SendMail(SignalSirname+": 卖出信号警报","卖出信号在 Ask="+sAsk+", Bid="+sBid+", 日期="+text+" Symbol="+Symbol()+" Period="+sPeriod);
      if(PushON) SendNotification(SignalSirname+": 卖出信号在 Ask="+sAsk+", Bid="+sBid+", 日期="+text+" Symbol="+Symbol()+" Period="+sPeriod);
     }
//---
  }
//+------------------------------------------------------------------+
//| 获取时间框架的字符串                               |
//+------------------------------------------------------------------+
string GetStringTimeframe(ENUM_TIMEFRAMES timeframe)
  {
//----
   return(StringSubstr(EnumToString(timeframe),7,-1));
//----
  }
在 OnCalculate() 块的指标计算周期后添加了 BuySignal() 和 SellSignal() 函数的调用：
//---
   BuySignal("JBrainTrend1Stop_Alert",BuyStopBuffer,SellStopBuffer,rates_total,prev_calculated,close,spread);
   SellSignal("JBrainTrend1Stop_Alert",SellStopBuffer,BuyStopBuffer,rates_total,prev_calculated,close,spread);
//---