//+------------------------------------------------------------------+
//|                                   Copyright © 2010, Ivan Kornilov|
//|                                                        MaByMa.mq4|
//|                                   excelf@gmail.com, skype: excelf|
//+------------------------------------------------------------------+
#property copyright "Copyright © 2010, Ivan Kornilov. All rights reserved."
#property link "excelf@gmail.com"

#property indicator_chart_window
#property indicator_buffers 2
#property indicator_color1 Green
#property indicator_color2 Red

extern int ma      = 10;
extern int signal  = 15;
extern int maType  = 0;
extern int maPrice = 0;

double SignalBuffer1[];
double SignalBuffer2[];


int init(){
   SetIndexStyle(0, DRAW_LINE, EMPTY, 1);
   SetIndexStyle(1, DRAW_LINE, EMPTY, 1);

   IndicatorDigits(Digits + 1);

   SetIndexBuffer(0, SignalBuffer1);
   SetIndexBuffer(1, SignalBuffer2);

   IndicatorShortName("MaByMa(" + ma + "," + signal + ")");
   SetIndexLabel(0, "SignalBuffer1");
   SetIndexLabel(1, "SignalBuffer2");
   SetIndexLabel(2, "MABuffer");
}

int start(){
   int counted_bars=IndicatorCounted();
   if(counted_bars > 0) {
       counted_bars--;
   }
   int limit = Bars - counted_bars - 1;

   for(int i = limit; i >= 0; i--) {
      SignalBuffer1[i] = iMA(NULL, 0, ma, 0, maType, maPrice, i);
      SignalBuffer2[i] = indicators_getMaByMaValue(ma, signal, Period(), i);
   } 
   
   for(i = limit; i >= 0; i--) {
      //SignalBuffer2[i] = iMAOnArray(SignalBuffer1, 0, signal, 0, maType, i);
   }  
}
#define SECOND_IN_MINUT 60

datetime indicators_maArrayLastTime = 0;
double indicators_maArray[];
double indicators_getMaByMaValue(int maPeriod, int maByma, int tf, int shift = 0) {   
    if(!ArrayIsSeries(indicators_maArray)) {
      ArraySetAsSeries(indicators_maArray, true);
    }
    int maArraySize = ArraySize(indicators_maArray);
    if(maArraySize != maByma) {
        maArraySize = ArrayResize(indicators_maArray, maByma);
    }

    int i;
    datetime time = iTime(NULL, tf, shift);
    indicators_maArray[0] = iMA(NULL, tf, maPeriod, 0, maType, maPrice, shift);
    if(indicators_maArrayLastTime != time) {
        if(time - indicators_maArrayLastTime == tf * SECOND_IN_MINUT) {
            for(i = maArraySize - 1; i > 0; i--) {
                indicators_maArray[i] = indicators_maArray[i - 1];
            }
        } else {
            for(i = maArraySize - 1; i > 0; i--) {
                indicators_maArray[i] = iMA(NULL, tf, maPeriod, 0, maType, maPrice, i + shift);
            }   
        }
        indicators_maArrayLastTime = time;
    } 
    return(iMAOnArray(indicators_maArray, 0, maByma, 0, maType, 0));
}