_3 MA Cross w_Alert v2_v1

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Author: Copyright � 2005, Jason Robinson (jnrtrading)
_3 MA Cross w_Alert v2_v1

This tool is designed as a visual and audible signaling system for traders who use Moving Averages (MA) to identify trends in financial markets. Instead of relying on a single average price, it monitors three different moving averages simultaneously to confirm momentum before generating a signal.

Core Logic Overview

The primary objective of this script is to identify "crossovers." A crossover occurs when short-term price trends move significantly above or below a long-term baseline. To reduce the frequency of false signals, this tool requires a specific "confirmation" from two faster averages before it triggers an alert.

How it Works

The script analyzes three different types of moving averages based on your preferences (such as Simple, Exponential, or Weighted):

  1. The Fast Average: Tracks very recent price action.
  2. The Medium Average: Tracks the intermediate trend.
  3. The Slow Average: Acts as the primary baseline (the "anchor").

Identifying an Upward Signal (Buy/Long)

For a positive signal to appear, the script looks for a specific alignment where the short-term momentum is breaking upward. It triggers a signal if:

  • The Fast Average has crossed from below to above the Slow Average.
  • AND either the Medium Average is already above the Slow Average, or the Medium Average has also just crossed upward.

Essentially, it ensures that both the short and medium trends are in agreement that the price is moving higher than the long-term baseline.

Identifying a Downward Signal (Sell/Short)

Conversely, for a negative signal to appear, the script looks for downward momentum. It triggers a signal if:

  • The Fast Average has crossed from above to below the Slow Average.
  • AND either the Medium Average is already below the Slow Average, or the Medium Average has also just crossed downward.

This ensures that both the short and medium trends are in agreement that the price is dropping below the long-term baseline.

Visual and Audible Alerts

When these specific conditions are met, the script performs three actions:

  • Visual Markers: It places an arrow on your chart (Aqua for upward signals, Coral for downward signals). The position of these arrows is automatically adjusted based on the current market volatility to ensure they remain visible and do not overlap with the price candles.
  • Real-Time Alerts: If enabled in the settings, the script will trigger a sound alert and a pop-up notification on your screen.
  • Smart Filtering: The logic includes a "time check" to ensure that you only receive one alert per candle, preventing your screen from being flooded with notifications if the price fluctuates rapidly around the crossover point.
Indicators Used
Moving average indicator
Miscellaneous
Implements a curve of type %1It issuies visual alerts to the screen
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_3 MA Cross w_Alert v2_v1 
// This is Not Tested , Use At Your Own Risk !

//+--------------------------------------------------------------------------+
//| 3 MA Cross w_Alert v2.mq4                                                |
//| Copyright © 2005, Jason Robinson (jnrtrading)                            |
//| http://www.jnrtading.co.uk                                               |
//| 3 ma conversion and Alert , David Honeywell , transport.david@gmail.com  |
//| http://finance.groups.yahoo.com/group/MetaTrader_Experts_and_Indicators/ |
//+--------------------------------------------------------------------------+

/*
  +-------------------------------------------------------------------------------+
  | Allows you to enter 3 ma periods and it will then show you and alert you at   |
  | which point the 2 faster ma's "OPEN" are both above or below the Slowest ma . |
  +-------------------------------------------------------------------------------+
*/   

#property copyright "Copyright © 2005, Jason Robinson (jnrtrading)"
#property link      "http://www.jnrtrading.co.uk"

#property indicator_chart_window
#property indicator_buffers 2
#property indicator_color1 Aqua
#property indicator_color2 Coral

double CrossUp[];
double CrossDown[];
double prevtime;
double Range, AvgRange;
double fasterMAnow, fasterMAprevious, fasterMAafter;
double mediumMAnow, mediumMAprevious, mediumMAafter;
double slowerMAnow, slowerMAprevious, slowerMAafter;

extern int FasterMA    =    2;
extern int FasterShift =    0;
extern int FasterMode  =    1; // 0 = sma, 1 = ema, 2 = smma, 3 = lwma

extern int MediumMA    =    4;
extern int MediumShift =    0;
extern int MediumMode  =    1; // 0 = sma, 1 = ema, 2 = smma, 3 = lwma

extern int SlowerMA    =   30;
extern int SlowerShift =    0;
extern int SlowerMode  =    1; // 0 = sma, 1 = ema, 2 = smma, 3 = lwma

extern int SoundAlert =    0; // 0 = disabled

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- indicators
   SetIndexStyle(0, DRAW_ARROW, EMPTY);
   SetIndexArrow(0, 233);
   SetIndexBuffer(0, CrossUp);
   SetIndexStyle(1, DRAW_ARROW, EMPTY);
   SetIndexArrow(1, 234);
   SetIndexBuffer(1, CrossDown);
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit()
  {
//---- 

//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start()
 {
   
   int limit, i, counter;
   
   int counted_bars=IndicatorCounted();
   //---- check for possible errors
   if(counted_bars<0) return(-1);
   //---- last counted bar will be recounted
   if(counted_bars>0) counted_bars--;
   
   limit=Bars-counted_bars;
   
   for(i = 0; i <= limit; i++)
    {
      
      counter=i;
      Range=0;
      AvgRange=0;
      for (counter=i ;counter<=i+9;counter++)
       {
         AvgRange=AvgRange+MathAbs(High[counter]-Low[counter]);
       }
      Range=AvgRange/10;
       
      fasterMAnow      = iMA(NULL, 0, FasterMA, FasterShift, FasterMode, PRICE_CLOSE, i+1);
      fasterMAprevious = iMA(NULL, 0, FasterMA, FasterShift, FasterMode, PRICE_CLOSE, i+2);
      fasterMAafter    = iMA(NULL, 0, FasterMA, FasterShift, FasterMode, PRICE_CLOSE, i-1);
      
      mediumMAnow      = iMA(NULL, 0, MediumMA, MediumShift, MediumMode, PRICE_CLOSE, i+1);
      mediumMAprevious = iMA(NULL, 0, MediumMA, MediumShift, MediumMode, PRICE_CLOSE, i+2);
      mediumMAafter    = iMA(NULL, 0, MediumMA, MediumShift, MediumMode, PRICE_CLOSE, i-1);
      
      slowerMAnow      = iMA(NULL, 0, SlowerMA, SlowerShift, SlowerMode, PRICE_CLOSE, i+1);
      slowerMAprevious = iMA(NULL, 0, SlowerMA, SlowerShift, SlowerMode, PRICE_CLOSE, i+2);
      slowerMAafter    = iMA(NULL, 0, SlowerMA, SlowerShift, SlowerMode, PRICE_CLOSE, i-1);
      
      if ((fasterMAnow     > slowerMAnow       &&
          fasterMAprevious <= slowerMAprevious  &&
          fasterMAafter    > slowerMAafter     &&
          mediumMAnow      > slowerMAnow     )
          ||
          (fasterMAnow     > slowerMAnow       &&
          mediumMAnow      > slowerMAnow       &&
          mediumMAprevious <= slowerMAprevious  &&
          mediumMAafter    > slowerMAafter   ))
       {
         CrossUp[i] = Low[i] - Range*0.5;
       }
       
      if ((fasterMAnow     < slowerMAnow       &&
          fasterMAprevious >= slowerMAprevious  &&
          fasterMAafter    < slowerMAafter     &&
          mediumMAnow      < slowerMAnow     )
          ||
          (fasterMAnow     < slowerMAnow       &&
          mediumMAnow      < slowerMAnow       &&
          mediumMAprevious >= slowerMAprevious  &&
          mediumMAafter    < slowerMAafter   ))
       {
         CrossDown[i] = High[i] + Range*0.5;
       }
      
    }
   
      if ((CrossUp[0] > 2000) && (CrossDown[0] > 2000)) { prevtime = 0; }
      
      if ((CrossUp[0] == Low[0] - Range*0.5) && (prevtime != Time[0]) && (SoundAlert != 0))
       {
         prevtime = Time[0];
         Alert(Symbol()," 3 MA Cross Up @  Hour ",Hour(),"  Minute ",Minute());
       }
      
      if ((CrossDown[0] == High[0] + Range*0.5) && (prevtime != Time[0]) && (SoundAlert != 0))
       {
         prevtime = Time[0];
         Alert(Symbol()," 3 MA Cross Down @  Hour ",Hour(),"  Minute ",Minute());
       }
   
   //Comment("  CrossUp[0]  ",CrossUp[0]," ,  CrossDown[0]  ",CrossDown[0]," ,  prevtime  ",prevtime);
   //Comment("");
   
   return(0);
 }

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