Max

//+------------------------------------------------------------------+
//|                                                          Max.mq4 |
//|                                         Copyright © 2010, sxTed. |
//|                                                    sxTed@gmx.com |
//| Purpose.: Alert when the Price crosses over EMA for any one of   |
//|           the Symbols provided by the Server and test function   |
//|           Symbols() in file Symbols.mqh                          |
//| Set up..: 1) Download file "Symbols.mqh" and place into the      |
//|              "\experts\include" subdirectory.                    |
//|           2) Place file "Max.mq4" into the "\experts\indicators" |
//|              subdirectory.                                       |
//|           3) Close and then re-start MetaTrader for it to find   |
//|              the new files.                                      |
//|           4) Compile "Max" indicator.                            |
//| Start up: 1) Click on "Navigator", click on "Custom indicators", |
//|              double click on "Max".                              |
//|           2) Window with header "Custom Indicator - Max" is      |
//|              displayed.                                          |
//|           3) Click on the "Common" tab and ensure that a tick is |
//|              showing in "Allow DLL imports" box by clicking it.  |
//|           4) Click on the "Inputs" tab.                          |
//|              For the value of input named "MA_Period" type in a  |
//|              moving average period or accept the default 100.    |
//|              Click on "OK".                                      |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2010, sxTed."
#property link      "sxTed@gmx.com"

#property indicator_chart_window
//---- input parameters
extern int       MA_Period=100;

#include <Symbols.mqh> // #### must be stated here to pull in the functions

//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
void start() {
  static string   sSymbols[1000];
  static int      iSymbols;
  static datetime tPreviousTime;
  double dMA;
  int    i;
  string sPeriod=","+PeriodToStr();
  
  // only load the Symbols once into the array "sSymbols"
  if(iSymbols == 0) iSymbols=Symbols(sSymbols);
  
  // only start analysis on complete bars
  if(tPreviousTime == Time[0]) return;
  
  for(i=0; i < iSymbols; i++) {
    dMA=iMA(sSymbols[i],0,MA_Period,13,MODE_EMA,PRICE_CLOSE,0);
    if(iOpen(sSymbols[i],0,1) > dMA && iClose(sSymbols[i],0,1) < dMA)
      Alert("Price crossed below ",MA_Period," EMA on ",sSymbols[i],sPeriod);
    if(iOpen(sSymbols[i],0,1) < dMA && iClose(sSymbols[i],0,1) > dMA)
      Alert("Price crossed above ",MA_Period," EMA on ",sSymbols[i],sPeriod);
  }
  tPreviousTime=Time[0];  
}
//+------------------------------------------------------------------+