3 MAs Cross Arrows

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//|                3 MAs Cross Arrows.mq4                            |
//|                Copyright © 2006  Scorpion@fxfisherman.com        |
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#property copyright "FxFisherman.com"
#property link      "http://www.fxfisherman.com"

#property indicator_chart_window
#property indicator_buffers 5
#property indicator_color1 Magenta
#property indicator_color2 Yellow
#property indicator_color3 DarkTurquoise
#property indicator_color4 Red
#property indicator_color5 White
#property indicator_width1 5
#property indicator_width2 5

extern int MA1_Period = 20;
extern int MA1_Type = 0;
extern int MA2_Period = 20;
extern int MA2_Type = 0;
extern int MA3_Period = 5;
extern int MA3_Type = 0;
extern int Shift_Bars=0;
extern int Bars_Count= 10000;

//---- buffers
double v1[];
double v2[];
double v3[];
double v4[];
double v5[];
double alertBar;
  
int init()
  {

   IndicatorBuffers(5);
   SetIndexArrow(0,218); // 234
   SetIndexStyle(0,DRAW_ARROW,STYLE_SOLID);
   SetIndexDrawBegin(0,-1);
   SetIndexBuffer(0, v1);
   SetIndexLabel(0,"Buy");
   
   SetIndexArrow(1,217);// 233
   SetIndexStyle(1,DRAW_ARROW,STYLE_SOLID);
   SetIndexDrawBegin(1,-1);
   SetIndexBuffer(1, v2);
   SetIndexLabel(1,"Sell");
   
   SetIndexStyle(2,DRAW_LINE,STYLE_SOLID,1);
   SetIndexDrawBegin(2,-1);
   SetIndexBuffer(2, v3);
   SetIndexLabel(2,"MA1");
   
   SetIndexStyle(3,DRAW_LINE,STYLE_SOLID,1);
   SetIndexDrawBegin(3,-1);
   SetIndexBuffer(3, v4);
   SetIndexLabel(3,"MA2");
   
   SetIndexStyle(4,DRAW_LINE,STYLE_SOLID,1);
   SetIndexDrawBegin(4,-1);
   SetIndexBuffer(4, v5);
   SetIndexLabel(4,"MA3");
   
   return(0);
  }

int start()
 {
  double ma1, ma2, ma3;
  int previous;
  int i;
  int shift;
  bool crossed_up, crossed_down;
  int counted_bars = IndicatorCounted();
  if (counted_bars > 0) counted_bars--;
  if (Bars_Count > 0 && Bars_Count <= Bars)
  {
    i = Bars_Count - counted_bars;
  }else{
    i = Bars - counted_bars;
  }
  
  while(i>=0)
   {
    shift = i + Shift_Bars;
    ma1 = iMA(Symbol(), Period(), MA1_Period, 0, MA1_Type, PRICE_HIGH, shift);
    ma2 = iMA(Symbol(), Period(), MA2_Period, 0, MA2_Type, PRICE_LOW, shift);
    ma3 = iMA(Symbol(), Period(), MA3_Period, 0, MA3_Type, Close, shift);
    Comment(ma1, " ", ma2, " ", ma3);
    crossed_up = (ma1 > ma3 && ma2 > ma3);
    crossed_down = (ma1 < ma3 && ma2 < ma3);
    
    v3[i] = ma1;
    v4[i] = ma2;
    v5[i] = ma3;
    if (crossed_up && previous != 1) {
      v1[i] = Open[shift];
      previous = 1;
      if(Bars>alertBar) {Alert("3Ma's Alert changing Up " + Symbol() + " on the " +  Period() + " minute chart.");alertBar = Bars;}
    }else if(crossed_down && previous != 2){
      v2[i] = Open[shift];
      previous = 2;
      if(Bars>alertBar) {Alert("3Ma's Alert changing Down " + Symbol() + " on the " +  Period() + " minute chart.");alertBar = Bars;}
    }
    
    i--;
   }   
  return(0);
 }
 
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