forexline__update_02

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Author: Copyright 2015, 3rjfx ~ 22/03/2015
forexline__update_02

This script is designed as a technical analysis tool for the MetaTrader platform, specifically created to help traders visualize price trends and receive real-time notifications based on moving average dynamics. Here is a breakdown of how it works in plain English:

Core Trend Visualization

The indicator functions by calculating several layers of "Moving Averages" (MAs). Instead of just looking at one simple line, it builds a hierarchy to filter out market noise:

  • Layered Smoothing: It calculates a fast-moving average, then applies another moving average on top of that result, and repeats this process again. This creates a highly smoothed data set that helps identify the "true" direction of the trend by filtering out minor price fluctuations.
  • Dynamic Trend Lines: Based on these calculations, the script identifies whether the market is in an "Up" or "Down" state. It then draws colored lines on your chart to represent these states:
    • A Blue Line appears when the shorter-term trend is moving above the long-term average (bullish).
    • A White Line appears when the shorter-term trend is moving below the long-term average (bearish).

Intelligent Signal Detection

The script doesn't just show lines; it actively monitors the relationship between the current price, the opening price of a candle, and the moving averages. It looks for four specific scenarios:

  1. Strong Upward Momentum: Price is consistently staying above the trend line while the trend itself is rising.
  2. Early Bullish Reversal: The trend is upward, but the current price has dipped slightly below the average (potentially a "buy the dip" signal).
  3. Strong Downward Momentum: Price is consistently staying below the trend line while the trend itself is falling.
  4. Early Bearish Reversal: The trend is downward, but the current price has poked slightly above the average (potentially a "sell the rally" signal).

Automated Alerts

One of the primary features of this script is its notification system. When one of the four scenarios mentioned above occurs on a new candle, the script calculates exactly how many "points" the price is from the trend line and triggers an alert.

Depending on your settings, you can receive these notifications via:

  • Pop-up Messages: Visual alerts on your trading screen.
  • Audio Signals: A sound file to notify you of a change.
  • Emails: Direct messages sent to your registered email address (if enabled).

The alerts are specifically designed to be informative, telling you the currency pair, the timeframe, and the specific distance from the trend line at the moment the signal occurs.

Indicators Used
Moving average indicatorMoving average indicator
Miscellaneous
Implements a curve of type %1It plays sound alertsIt sends emails
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forexline__update_02 
//+------------------------------------------------------------------+
//|                                                    ForexLine.mq4 |
//|                              Copyright 2015,  3rjfx ~ 22/03/2015 |
//|                              https://www.mql5.com/en/users/3rjfx |
//+------------------------------------------------------------------+
#property copyright "Copyright 2015,  3rjfx ~ 22/03/2015"
#property link      "https://www.mql5.com/en/users/3rjfx"
#property version   "1.00"
//--
/* Update (26/03/2015): 
   ~ Added Alerts (Messages, Email dan Sound) to the indicator.
   ~ Eliminate bugs due to the use of ArraySetAsSeries true.
   //--
   Update (08/04/2015):
   ~ Eliminate bugs due to the use of LinearWeightedMAOnBuffer.
   ~ Enhance the signal alerts.
*/
//--
#property indicator_chart_window
//-
#property indicator_buffers 7
#property indicator_color1 clrNONE
#property indicator_color2 clrNONE
#property indicator_color3 clrNONE
#property indicator_color4 clrNONE
#property indicator_color5 clrBlue
#property indicator_color6 clrWhite
#property indicator_color7 clrNONE
//--
#property indicator_width5 3
#property indicator_width6 3
//--
extern bool      SoundAlerts = true;
extern bool      MsgAlerts   = true;
extern bool      eMailAlerts = false;
extern string SoundAlertFile = "alert.wav";
extern color ForexLineColor1 = clrBlue;  // Line Up
extern color ForexLineColor2 = clrWhite;  // Line Down
//-- buffers
double lwma05Buffers[];
double lwma10Buffers[];
double lwma20Buffers[];
double line20Buffers[];
double uplineBuffers[];
double dnlineBuffers[];
double posprc[];
//-
int digit;
int mafast=5;
int maslow=10;
int mdma20=20;
int cural,prval;
int prvAlertBar;
//-
bool lup,ldn;
//-
string symbol=_Symbol;
string alBase,alSubj,alMsg;
//-
void EventSetTimer();
//--
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit(void)
  {
   //-- Checking the Digits Point
   if(Digits==3||Digits==5)
      {digit=Digits;}
   else {digit=Digits+1;}
   //-
   IndicatorDigits(digit);
   //--
//--- indicator buffers mapping
   IndicatorBuffers(7);
   //--
   SetIndexBuffer(0,lwma05Buffers);
   SetIndexBuffer(1,lwma10Buffers);
   SetIndexBuffer(2,lwma20Buffers);
   SetIndexBuffer(3,line20Buffers);
   SetIndexBuffer(4,uplineBuffers);
   SetIndexBuffer(5,dnlineBuffers);
   SetIndexBuffer(6,posprc);
//--- indicator lines
   SetIndexStyle(0,DRAW_NONE);
   SetIndexStyle(1,DRAW_NONE);
   SetIndexStyle(2,DRAW_NONE);
   SetIndexStyle(3,DRAW_NONE);
   SetIndexStyle(4,DRAW_LINE,EMPTY,3,ForexLineColor1);
   SetIndexStyle(5,DRAW_LINE,EMPTY,3,ForexLineColor2);
   SetIndexStyle(6,DRAW_NONE);
   //--- name for DataWindow and indicator subwindow label
   SetIndexLabel(0,NULL);
   SetIndexLabel(1,NULL);
   SetIndexLabel(2,NULL);
   SetIndexLabel(3,NULL);
   SetIndexLabel(4,"Rice Above: ");
   SetIndexLabel(5,"Down Below: ");
   SetIndexLabel(6,NULL);
   //--
   SetIndexDrawBegin(4,maslow);
   SetIndexDrawBegin(5,maslow);
   //--
   IndicatorShortName("FXLine");
   //--
   prvAlertBar=Bars-1;   
//--- initialization done
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Custom indicator deinitialization function                       |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
  {
//----  
   //--
   EventKillTimer();
   GlobalVariablesDeleteAll();   
//----
   return;
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
                const int prev_calculated,
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
  {
//---
   int i,limit;
   cural=-1;
   lup=false;
   ldn=false;
//--- check for bars count
   if(rates_total<=maslow) return(0);
//--- Set Last error value to Zero
   ResetLastError();
   RefreshRates();   
//--- last counted bar will be recounted
   limit=rates_total-prev_calculated;
   if(prev_calculated>0) limit++;
   //--
//--- counting from rates_total to 0
   ArraySetAsSeries(lwma05Buffers,true);
   ArraySetAsSeries(lwma10Buffers,true);
   ArraySetAsSeries(lwma20Buffers,true);
   ArraySetAsSeries(line20Buffers,true);
   ArraySetAsSeries(uplineBuffers,true);
   ArraySetAsSeries(dnlineBuffers,true);
   ArraySetAsSeries(posprc,true);
   ArraySetAsSeries(low,true);
   ArraySetAsSeries(high,true);
   ArraySetAsSeries(close,true);
   //--
//--- main cycle
   for(i=limit-1; i>=0; i--)
     {
       lwma05Buffers[i]=iMA(symbol,0,mafast,0,3,4,i);
       line20Buffers[i]=iMA(symbol,0,mdma20,0,0,4,i);
     }
   //-
   for(i=limit-1; i>=0; i--)
     {lwma10Buffers[i]=iMAOnArray(lwma05Buffers,0,maslow,0,3,i);}
   for(i=limit-1; i>=0; i--)
     {lwma20Buffers[i]=iMAOnArray(lwma10Buffers,0,mdma20,0,3,i);} 
   //-
   for(i=limit-1; i>=0; i--)
     {
       //--
       if((lwma05Buffers[i]>lwma20Buffers[i])) {lup=true; ldn=false;}
       if((lwma05Buffers[i]<lwma20Buffers[i])) {ldn=true; lup=false;}
       if(lup==true)
         {uplineBuffers[i]=line20Buffers[i]; dnlineBuffers[i]=EMPTY_VALUE;}
       if(ldn==true)
         {dnlineBuffers[i]=line20Buffers[i]; uplineBuffers[i]=EMPTY_VALUE;}
       //-
       if(i==0)
         {
           //--
           if((lup==true)&&(lwma05Buffers[i]>lwma05Buffers[i+1])&&(close[i]>open[i])&&(close[i]>=lwma05Buffers[i]))
             {posprc[i]=(MathAbs(close[i]-line20Buffers[i]))/Point; cural=3;}
           if((lup==true)&&(lwma05Buffers[i]>lwma05Buffers[i+1])&&(open[i]>=lwma05Buffers[i])&&(close[i]<lwma05Buffers[i]))
             {posprc[i]=(MathAbs(close[i]-line20Buffers[i]))/Point; cural=1;}
           if((ldn==true)&&(lwma05Buffers[i]<lwma05Buffers[i+1])&&(close[i]<open[i])&&(close[i]<=lwma05Buffers[i]))
             {posprc[i]=(MathAbs(close[i]-line20Buffers[i]))/Point; cural=2;}
           if((ldn==true)&&(lwma05Buffers[i]<lwma05Buffers[i+1])&&(open[i]<=lwma05Buffers[i])&&(close[i]>lwma05Buffers[i]))
             {posprc[i]=(MathAbs(close[i]-line20Buffers[i]))/Point; cural=0;}
           //--
         }
       //--
     }
   //--
   posAlerts(cural);   
   //---
//--- return value of prev_calculated for next call
   return(rates_total);
  }
//---//

void doAlerts(string msgText,string eMailSub)
  {
    //--
    if(MsgAlerts) Alert(msgText);
    if(SoundAlerts) PlaySound(SoundAlertFile);
    if(eMailAlerts) SendMail(eMailSub,msgText);
    //--
  }
//---/

//---/
string strTF(int period)
  {
   switch(period)
     {
       //--
       case PERIOD_M1: return("M1");
       case PERIOD_M5: return("M5");
       case PERIOD_M15: return("M15");
       case PERIOD_M30: return("M30");
       case PERIOD_H1: return("H1");
       case PERIOD_H4: return("H4");
       case PERIOD_D1: return("D1");
       case PERIOD_W1: return("W1");
       case PERIOD_MN1: return("MN");
       //--
     }
   return(_Period);
  }  
//---/

void posAlerts(int alerts)
   {
     //--
     if((cural!=prval)&&(alerts==3))
        {     
          alBase=StringConcatenate(symbol,", TF: ",strTF(_Period),", ForexLine: ");
          alSubj=StringConcatenate(alBase," The Price still goes Up, ",DoubleToStr(posprc[0],0)," Points above the 20 MA.");
          alMsg=StringConcatenate(alSubj," @ ",TimeToStr(TimeLocal(),TIME_SECONDS));
          if(Bars>prvAlertBar) {prvAlertBar=Bars; doAlerts(alMsg,alSubj);}
        }       
     //--
     if((cural!=prval)&&(alerts==2))
        {     
          alBase=StringConcatenate(symbol,", TF: ",strTF(_Period),", ForexLine: ");
          alSubj=StringConcatenate(alBase," The Price still goes Down, ",DoubleToStr(posprc[0],0)," Points below the 20 MA.");
          alMsg=StringConcatenate(alSubj," @ ",TimeToStr(TimeLocal(),TIME_SECONDS));
          if(Bars>prvAlertBar) {prvAlertBar=Bars; doAlerts(alMsg,alSubj);}
        }
     //--
     if((cural!=prval)&&(alerts==0))
        {     
          alBase=StringConcatenate(symbol,", TF: ",strTF(_Period),", ForexLine: ");
          alSubj=StringConcatenate(alBase," The Price began to Up, ",DoubleToStr(posprc[0],0)," Points below the 20 MA.");
          alMsg=StringConcatenate(alSubj," @ ",TimeToStr(TimeLocal(),TIME_SECONDS));
          if(Bars>prvAlertBar) {prvAlertBar=Bars; doAlerts(alMsg,alSubj);}
        }              
     //--
     if((cural!=prval)&&(alerts==1))
        {     
          alBase=StringConcatenate(symbol,", TF: ",strTF(_Period),", ForexLine: ");
          alSubj=StringConcatenate(alBase," The Price began to Down, ",DoubleToStr(posprc[0],0)," Points above the 20 MA.");
          alMsg=StringConcatenate(alSubj," @ ",TimeToStr(TimeLocal(),TIME_SECONDS));
          if(Bars>prvAlertBar) {prvAlertBar=Bars; doAlerts(alMsg,alSubj);}
        }                
     //--
     prval=cural;
     return;
     //--
   //----
   } //-end posAlerts()
//---/
//+------------------------------------------------------------------+

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