真实作者： Iin Zulkarnainn
Iin_MA_Signal 信号指示器具备警报、邮件和推送通知功能，帮助交易者及时捕捉市场动向。
为了实现警报、邮件和推送通知的功能，指标代码做了以下几个修改：
- 引入了新的输入参数
input uint NumberofBar=1;//信号的条数 input bool SoundON=true; //启用警报 input uint NumberofAlerts=2;//警报次数 input bool EMailON=false; //启用邮件发送信号 input bool PushON=false; //启用移动设备推送信号
- 在指标代码末尾添加了三个新函数：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 double &BuyArrow[], // 存储买入信号的指标缓冲区 const int Rates_total, // 当前条数 const int Prev_calculated, // 上一个Tick的条数 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; if(SeriesTest) index=int(NumberofBar); else index=Rates_total-int(NumberofBar)-1; if(NormalizeDouble(BuyArrow[index],_Digits) && 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+=Spread[index]; string sAsk=DoubleToString(Ask,_Digits); string sBid=DoubleToString(Bid,_Digits); string sPeriod=GetStringTimeframe(ChartPeriod()); if(SoundON) Alert("BUY signal \n Ask=",Ask,"\n Bid=",Bid,"\n currtime=",text,"\n Symbol=",Symbol()," Period=",sPeriod); if(EMailON) SendMail(SignalSirname+": BUY signal alert","BUY signal at Ask="+sAsk+", Bid="+sBid+", Date="+text+" Symbol="+Symbol()+" Period="+sPeriod); if(PushON) SendNotification(SignalSirname+": BUY signal at Ask="+sAsk+", Bid="+sBid+", Date="+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 double &SellArrow[], // 存储卖出信号的指标缓冲区 const int Rates_total, // 当前条数 const int Prev_calculated, // 上一个Tick的条数 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; if(SeriesTest) index=int(NumberofBar); else index=Rates_total-int(NumberofBar)-1; if(NormalizeDouble(SellArrow[index],_Digits) && 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+=Spread[index]; string sAsk=DoubleToString(Ask,_Digits); string sBid=DoubleToString(Bid,_Digits); string sPeriod=GetStringTimeframe(ChartPeriod()); if(SoundON) Alert("SELL signal \n Ask=",Ask,"\n Bid=",Bid,"\n currtime=",text,"\n Symbol=",Symbol()," Period=",sPeriod); if(EMailON) SendMail(SignalSirname+": SELL signal alert","SELL signal at Ask="+sAsk+", Bid="+sBid+", Date="+text+" Symbol="+Symbol()+" Period="+sPeriod); if(PushON) SendNotification(SignalSirname+": SELL signal at Ask="+sAsk+", Bid="+sBid+", Date="+text+" Symbol="+Symbol()+" Period="+sPeriod); } //--- } //+------------------------------------------------------------------+ //| 获取时间框架的字符串形式 | //+------------------------------------------------------------------+ string GetStringTimeframe(ENUM_TIMEFRAMES timeframe) { //---- return(StringSubstr(EnumToString(timeframe),7,-1)); //---- }
- 在 OnCalculate() 块中，指标计算周期结束后，添加了对 BuySignal() 和 SellSignal() 函数的调用。
//--- BuySignal("Iin_MA_Signal_Alert",BuyBuffer,rates_total,prev_calculated,close,spread); SellSignal("Iin_MA_Signal_Alert",SellBuffer,rates_total,prev_calculated,close,spread); //---
其中，BuyBuffer 和 SellBuffer 是用于存储买入和卖出信号的指标缓冲区。指标缓冲区中的空值必须设置为零或 EMPTY_VALUE。
假设在指标代码的 OnCalculate() 块中只会调用一次 BuySignal() 和 SellSignal() 函数。
图1. Iin_MA_Signal_Alert在图表上的表现
图2. Iin_MA_Signal_Alert生成警报