3 MA Cross w_Alert v2_001

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Author: Copyright � 2005, Jason Robinson (jnrtrading)
3 MA Cross w_Alert v2_001

This script is designed for traders using the MetaTrader platform who want to identify specific trend changes based on moving averages. It functions as a visual and auditory signaling tool that monitors three different moving average lines (Fast, Medium, and Slow) to detect momentum shifts.

Core Logic Overview

The primary goal of this script is to identify "crossovers." In trading, a crossover occurs when a short-term average moves across a long-term average, often signaling a change in the price trend. This specific tool adds a layer of confirmation by requiring multiple moving averages to align before triggering a signal.

How it Works

The script continuously analyzes three different types of moving averages on your chart:

  1. Fast Moving Average: Reacts quickly to recent price changes.
  2. Medium Moving Average: Provides a balanced view of the current trend.
  3. Slow Moving Average: Acts as the primary baseline for long-term direction.

Instead of just looking at one line crossing another, the script looks for a "concurrence." It triggers a signal only when the status of the Fast and Medium moving averages relative to the Slow moving average meets specific criteria.

Signal Identification

The script looks for two types of signals:

  • Upward Trend Signals: The script detects an "Up" signal when the faster moving averages cross above the slowest moving average. To ensure this isn't just a temporary "jitter" in the price, it checks that both the Fast and Medium averages are positioned above the Slow average at the moment of the cross.
  • Downward Trend Signals: Conversely, it detects a "Down" signal when the faster moving averages move below the slowest moving average. It confirms this by ensuring both the Fast and Medium averages are positioned below the Slow average.

Visual and Audible Alerts

To help you react quickly to these market movements, the script provides two types of notifications:

  • On-Chart Visuals: The script places specific icons (arrows) on your chart at the exact price point where a valid crossover is detected. These are placed slightly above or below the price candles to ensure they remain visible.
  • Audio Notifications: If enabled in the settings, the script will trigger a sound alert and a pop-up message on your screen the moment a new signal occurs. This includes a timestamp (hour and minute) so you can instantly identify when the trend shift was flagged.

Summary of Behavior

By requiring multiple moving averages to agree with one another before providing a signal, the script aims to filter out "noise"—minor price fluctuations that might trigger false signals from a single moving average. It only notifies you when there is a more significant consensus among the different timeframes being monitored.

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_001 
// 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    =    5;
extern int FasterShift =   -5;
extern int FasterMode  =    1; // 0 = sma, 1 = ema, 2 = smma, 3 = lwma

extern int MediumMA    =   20;
extern int MediumShift =   -5;
extern int MediumMode  =    1; // 0 = sma, 1 = ema, 2 = smma, 3 = lwma

extern int SlowerMA    =   34;
extern int SlowerShift =    0;
extern int SlowerMode  =    1; // 0 = sma, 1 = ema, 2 = smma, 3 = lwma

extern int SoundAlert =    1; // 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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