MQL4当价格达到一定水平时如何提醒？

Question

我有这个免费指标的名称是 FiboPiv_v2.mq4 。

这是我使用的工具，在交易剥头皮方面有很好的效果。我通常手动设置警报，但我看到代码是开放的，所以我想做一个修改，但我是编程MQL4的新手。

我想添加一个弹出窗口和声音，上面写着“ AUDUSD已达到S1 ”。

指标代码：

#property indicator_chart_window
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
{
//---- indicators
return(0);
}
//+------------------------------------------------------------------+
//| Custom indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit()
{
//----
ObjectDelete("S1");
ObjectDelete("S2");
ObjectDelete("S3");
ObjectDelete("R1");
ObjectDelete("R2");
ObjectDelete("R3");
ObjectDelete("PIVIOT");
ObjectDelete("Support 1");
ObjectDelete("Support 2");
ObjectDelete("Support 3");
ObjectDelete("Piviot level");
ObjectDelete("Resistance 1");
ObjectDelete("Resistance 2");
ObjectDelete("Resistance 3");
Comment(" ");
//----
return(0);
}
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start()
{
double rates[1][6],yesterday_close,yesterday_high,yesterday_low;
ArrayCopyRates(rates,Symbol(),PERIOD_D1);
//----
if(DayOfWeek()==1)
 {
  if(TimeDayOfWeek(iTime(Symbol(),PERIOD_D1,1))==5)
    {
     yesterday_close= rates[1][4];
     yesterday_high = rates[1][3];
     yesterday_low=rates[1][2];
    }
  else
    {
     for(int d=5;d>=0;d--)
       {
        if(TimeDayOfWeek(iTime(Symbol(),PERIOD_D1,d))==5)
          {
           yesterday_close= rates[d][4];
           yesterday_high = rates[d][3];
           yesterday_low=rates[d][2];
          }

       }
    }
 }
else
 {
  yesterday_close= rates[1][4];
  yesterday_high = rates[1][3];
  yesterday_low=rates[1][2];
 }
//---- Calculate Pivots
Comment("\nYesterday quotations:\nH ",yesterday_high,"\nL 
",yesterday_low,"\nC ",yesterday_close);
double R=yesterday_high-yesterday_low;//range
double p=(yesterday_high+yesterday_low+yesterday_close)/3;// Standard Pivot
double r3 = p + (R * 1.000);
double r2 = p + (R * 0.618);
double r1 = p + (R * 0.382);
double s1 = p - (R * 0.382);
double s2 = p - (R * 0.618);
double s3 = p - (R * 1.000);
//----
drawLine(r3,"R3",Lime,0);
drawLabel("Resistance 3",r3,Lime);
drawLine(r2,"R2",Green,0);
drawLabel("Resistance 2",r2,Green);
drawLine(r1,"R1",DarkGreen,0);
drawLabel("Resistance 1",r1,DarkGreen);
drawLine(p,"PIVIOT",Blue,1);
drawLabel("Piviot level",p,Blue);
drawLine(s1,"S1",Maroon,0);
drawLabel("Support 1",s1,Maroon);
drawLine(s2,"S2",Crimson,0);
drawLabel("Support 2",s2,Crimson);
drawLine(s3,"S3",Red,0);
drawLabel("Support 3",s3,Red);
//----
return(0);
}
//+------------------------------------------------------------------+
void drawLabel(string name,double lvl,color Color)
{
if(ObjectFind(name)!=0)
 {
  if(Bars<10) return;
  ObjectCreate(name,OBJ_TEXT,0,Time[10],lvl);
  ObjectSetText(name,name,8,"Arial",EMPTY);
  ObjectSet(name,OBJPROP_COLOR,Color);
 }
else
 {
  if(Bars<10) return;
  ObjectMove(name,0,Time[10],lvl);
 }
}
 //----
 void drawLine(double lvl,string name,color Col,int type)
 {
 if(ObjectFind(name)!=0)
  {
   ObjectCreate(name,OBJ_HLINE,0,Time[0],lvl,Time[0],lvl);
   if(type==1)
     ObjectSet(name,OBJPROP_STYLE,STYLE_SOLID);
   else
     ObjectSet(name,OBJPROP_STYLE,STYLE_DOT);
   ObjectSet(name,OBJPROP_COLOR,Col);
   ObjectSet(name,OBJPROP_WIDTH,1);
   }
   else
    {
    ObjectDelete(name);
    ObjectCreate(name,OBJ_HLINE,0,Time[0],lvl,Time[0],lvl);
    if(type==1)
     ObjectSet(name,OBJPROP_STYLE,STYLE_SOLID);
  else
     ObjectSet(name,OBJPROP_STYLE,STYLE_DOT);
  ObjectSet(name,OBJPROP_COLOR,Col);
  ObjectSet(name,OBJPROP_WIDTH,1);
 }
  }
//+--------------------------------------------------------------------+

Answer 1

首先：

忘记在指标类型的MQL4代码中进行 Alert() 调用。详情请参阅低于+ MQL4关于此类和类似禁止阻止调用的文档。

下一篇：
原始代码非常低效

_{（有关新 -MQL4.56789的文档中的详细信息，2018 / Q2仍然运行所有（确实是所有平台的并发运行的CustomIndicator +指标实例）在one，single，solo，blocking-vulnerability，SPOF-thread（!!））}

一种效率 - 已修复代码， 摇动所有树“自上而下 {{1} } -arrival，它还执行所有必要的更新并显示蜂鸣报警方案：

QUOTE