//+------------------------------------------------------------------+
//|                                   Copyright © 2009, Ivan Kornilov|
//|                                      AccumulationDistribution.mq4|
//+------------------------------------------------------------------+
#property copyright "Copyright © 2009, Ivan Kornilov"
#property link "excelf@gmail.com"

#property indicator_separate_window
#property indicator_buffers 4
#property indicator_color1 Red
#property indicator_color2 Green
#property indicator_level1 0
#property indicator_level2 500
#property indicator_level3 -500

#property indicator_level4 2000
#property indicator_level5 -2000
 
extern int period=377;
extern int periodAccumulation=89;
extern int MAperiod1=55;
extern int MAperiod2=34;
extern bool showValueChenal = false;
extern int history = 3000;

double ExtBuffer1[];
double ExtBuffer2[];
double ExtBuffer3[];
double ExtBuffer4[];

double ExtBuffer5[];


int init() {
    SetIndexStyle(3, DRAW_NONE);
    SetIndexBuffer(3, ExtBuffer1);

    int type = DRAW_NONE;
    if(showValueChenal) {
        type = DRAW_HISTOGRAM;
    }
    SetIndexStyle(2, type, STYLE_SOLID);
    SetIndexBuffer(2, ExtBuffer2);
    
    SetIndexStyle(0, DRAW_LINE, STYLE_SOLID);
    SetIndexBuffer(0, ExtBuffer3);
    
    SetIndexStyle(1, DRAW_LINE, STYLE_SOLID);
    SetIndexBuffer(1, ExtBuffer4);
    
    
    
    int counted_bars = Bars - history + period * 2;
    SetIndexDrawBegin(0, counted_bars);
    SetIndexDrawBegin(1, counted_bars);
    SetIndexDrawBegin(2, counted_bars);
        
    IndicatorShortName("Accumulation/Distribution (" + period + "," + periodAccumulation+ "," + MAperiod1 + "," + MAperiod2 + ")");
    SetIndexLabel(1, "Ma Fast");
    SetIndexLabel(2, "Ma Slow");

    return(0);
}

int start() 
{

    int limit,i,k;
    if(history < limit) {
        limit = history;
    }
       
   int counted_bars = IndicatorCounted();
   if(counted_bars < 0)  return(-1);
   if(counted_bars > 0)   counted_bars--;
   limit = Bars - counted_bars;
   if(counted_bars==0) limit-=2+MathMax(periodAccumulation,period);
       
    
    if(counted_bars < 1){
        for(i = 0; i <= limit; i++) {
           ExtBuffer1[limit-i] = 0;
        }
    }
    
    for(i = limit; i >= 0; i--){  
        double MinVOLUME = Low[iLowest(NULL,0 ,MODE_VOLUME, 288, i)];

        double barSize = High[i] - Low[i];
        if(barSize == 0 ) {
            barSize = Point;
        }
        double value = (Close[i] - Open[i]) / barSize;
        double bayPower = 0;
        for(k = i; k < i + periodAccumulation; k++) {
            double bpBar = High[k] - Close[k+1] + Close[k] - Low[k];
            if(bpBar > 0) {
                bayPower+=bpBar;
            }
        }
        
        double sellPower = 0;
        for(k = i; k < i + periodAccumulation; k++) {
            double spBar = Close[k+1] - Low[k] + High[k] - Close[k];
            if(spBar > 0) {
                sellPower+=spBar;
            }
        }
        double temp = MathAbs(bayPower + sellPower);
        if(temp == 0) {
            temp = Point;
        }
        
        double powerTotal = bayPower / temp;
        ExtBuffer1[i] = value * (Volume[i] - MinVOLUME) * powerTotal;
    }
    
    for(i = 0; i < limit; i++) {
        double sum = 0;
        for(k = i; k < i + period; k++) {
            sum+=ExtBuffer1[k];
        }
        ExtBuffer2[i]=sum;   
    }    
    
    for(i = 0; i < limit; i++) {
        ExtBuffer3[i]=iMAOnArray(ExtBuffer2, Bars, MAperiod1, 0, MODE_EMA, i) * 6;    
    }   
    for(i = 0; i < limit; i++) {
        ExtBuffer4[i]=iMAOnArray(ExtBuffer3, Bars, MAperiod2, 0, MODE_EMA, i);
    }
    return(0);
}