ADX_Cross

//+------------------------------------------------------------------+
//|                      Copyright © 2004, MetaQuotes Software Corp. |
//|                                       http://www.metaquotes.net/ |
//+------------------------------------------------------------------+

#property copyright "Copyright © 2004, MetaQuotes Software Corp."
#property link "http://www.metaquotes.net"
#property indicator_chart_window
#property indicator_buffers 2
#property indicator_color1 Lime
#property indicator_color2 Red
extern int ADXcrossesPeriod = 14;
extern int CountBars=350;
double ExtMapBuffer1[];
double ExtMapBuffer2[];
double b4plusdi, b4minusdi, nowplusdi, nowminusdi;
int    nShift;   

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+

int init()
  {

    SetIndexStyle(0, DRAW_ARROW, 0, 1);
    SetIndexArrow(0, 225);
    SetIndexBuffer(0, ExtMapBuffer1);

    SetIndexStyle(1, DRAW_ARROW, 0, 1);
    SetIndexArrow(1, 226);
    SetIndexBuffer(1, ExtMapBuffer2);

    IndicatorShortName("ADXcrosses(" + ADXcrossesPeriod + ")");
    SetIndexLabel(0, "ADXcrUp");
    SetIndexLabel(1, "ADXcrDn"); 

    switch(Period())
      {
        case     1: nShift = 1;   break;    
        case     5: nShift = 3;   break; 
        case    15: nShift = 5;   break; 
        case    30: nShift = 10;  break; 
        case    60: nShift = 15;  break; 
        case   240: nShift = 20;  break; 
        case  1440: nShift = 80;  break; 
        case 10080: nShift = 100; break; 
        case 43200: nShift = 200; break;               
      }

    return(0);
  }

//+------------------------------------------------------------------+
//| Custor indicator deinitialization function                       |
//+------------------------------------------------------------------+

int deinit()
  {

    return(0);
  }

//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+

int start()
  {
    int limit;
    int counted_bars = IndicatorCounted();

    if(counted_bars < 0) 
        return(-1);

    if(counted_bars > 0) 
        counted_bars--;
    limit = Bars - counted_bars;

    for(int i = 0; i < limit; i++)
      {
        b4plusdi = iADX(NULL, 0, ADXcrossesPeriod, PRICE_CLOSE, MODE_PLUSDI, i - 1);
        nowplusdi = iADX(NULL, 0, ADXcrossesPeriod, PRICE_CLOSE, MODE_PLUSDI, i);
        b4minusdi = iADX(NULL, 0, ADXcrossesPeriod, PRICE_CLOSE, MODE_MINUSDI, i - 1);
        nowminusdi = iADX(NULL, 0, ADXcrossesPeriod, PRICE_CLOSE, MODE_MINUSDI, i);  

        if(b4plusdi > b4minusdi && nowplusdi < nowminusdi)
            ExtMapBuffer1[i] = Low[i] - nShift*Point;

        if(b4plusdi < b4minusdi && nowplusdi > nowminusdi)
            ExtMapBuffer2[i] = High[i] + nShift*Point;
      }

    return(0);
  }