//+------------------------------------------------------------------+
//|                                                      Learn 3.mq5 |
//|                                 Copyright 2016, Hudson Analytics |
//|                                                    NurudeenAmedu |
//+------------------------------------------------------------------+
#property copyright "Copyright 2016, Hudson Analytics"
#property link "NurudeenAmedu"
#property version "1.00"
#property indicator_separate_window
#property indicator_buffers 3
#property indicator_plots 2
#property indicator_type1 DRAW_LINE
#property indicator_color1 clrBlue
#property indicator_type2 DRAW_LINE
#property indicator_color2 clrRed

double ExtBuffer1[];
double ExtBuffer2[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
{
    //--- indicator buffers mapping
    SetIndexBuffer(0, ExtBuffer1);
    SetIndexBuffer(1, ExtBuffer2);
    //---
    return (INIT_SUCCEEDED);
}
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,     // 1001
                const int prev_calculated, // 1000
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
{
    //---
    int x, y, limit;
    int min_rates_total = 100;

    ArraySetAsSeries(close, true);
    ArraySetAsSeries(ExtBuffer1, true);
    ArraySetAsSeries(ExtBuffer2, true);

    //---- calculations of the necessary amount of data to be copied
    //---- and the 'limit' starting index for the bars recalculation loop
    if (prev_calculated > rates_total || prev_calculated <= 0) // checking for the first start of the indicator calculation
    {
        limit = rates_total - min_rates_total - 1; // calculated number of all bars
    }
    else
    {
        limit = rates_total - prev_calculated; // starting index for calculation of new bars
    }

    for (int i = limit; i >= 0; i--)
    {
        x = 0;
        y = 0;

        if (close[i] > close[i + 1])
            x++;
        if (close[i] < close[i + 1])
            y++;

        if (close[i] > close[i + 2])
            x++;
        if (close[i] < close[i + 2])
            y++;

        if (close[i] > close[i + 3])
            x++;
        if (close[i] < close[i + 3])
            y++;

        if (close[i] > close[i + 4])
            x++;
        if (close[i] < close[i + 4])
            y++;

        if (close[i] > close[i + 5])
            x++;
        if (close[i] < close[i + 5])
            y++;

        if (close[i] > close[i + 6])
            x++;
        if (close[i] < close[i + 6])
            y++;

        //////////////////////////
        if (close[i + 1] > close[i + 2])
            x++;
        if (close[i + 1] < close[i + 2])
            y++;

        if (close[i + 1] > close[i + 3])
            x++;
        if (close[i + 1] < close[i + 3])
            y++;

        if (close[i + 1] > close[i + 4])
            x++;
        if (close[i + 1] < close[i + 4])
            y++;

        if (close[i + 1] > close[i + 5])
            x++;
        if (close[i + 1] < close[i + 5])
            y++;

        if (close[i + 1] > close[i + 6])
            x++;
        if (close[i + 1] < close[i + 6])
            y++;

        //////////////////////////////
        if (close[i + 2] > close[i + 3])
            x++;
        if (close[i + 2] < close[i + 3])
            y++;

        if (close[i + 2] > close[i + 4])
            x++;
        if (close[i + 2] < close[i + 4])
            y++;

        if (close[i + 2] > close[i + 5])
            x++;
        if (close[i + 2] < close[i + 5])
            y++;

        if (close[i + 2] > close[i + 6])
            x++;
        if (close[i + 2] < close[i + 6])
            y++;

        ////////////////////////////
        if (close[i + 3] > close[i + 4])
            x++;
        if (close[i + 3] < close[i + 4])
            y++;

        if (close[i + 3] > close[i + 5])
            x++;
        if (close[i + 3] < close[i + 5])
            y++;

        if (close[i + 3] > close[i + 6])
            x++;
        if (close[i + 3] < close[i + 6])
            y++;

        ////////////////////////////
        if (close[i + 4] > close[i + 5])
            x++;
        if (close[i + 4] < close[i + 5])
            y++;

        if (close[i + 4] > close[i + 6])
            x++;
        if (close[i + 4] < close[i + 6])
            y++;

        ExtBuffer1[i] = MathAbs(x);
        ExtBuffer2[i] = MathAbs(y);
    }
    //--- return value of prev_calculated for next call
    return (rates_total);
}
//+------------------------------------------------------------------+