//+------------------------------------------------------------------+
//|                                             BuySellVolumes.mq5  |
//|                       Copyright © 2023, YourName                |
//|                                                                  |
//+------------------------------------------------------------------+
#property copyright "YourName"
#property link "https://www.yourwebsite.com"
#property version "1.00"

//
#property indicator_separate_window
#property indicator_buffers 4
#property indicator_plots 4

//--- Plot settings for Buy Volume
#property indicator_label1 "Buy Volume"
#property indicator_type1 DRAW_HISTOGRAM
#property indicator_color1 clrLime

//--- Plot settings for Sell Volume
#property indicator_label2 "Sell Volume"
#property indicator_type2 DRAW_HISTOGRAM
#property indicator_color2 clrRed

//--- Plot settings for Buy Volume MA
#property indicator_label3 "Buy Volume MA"
#property indicator_type3 DRAW_LINE
#property indicator_color3 clrGreen

//--- Plot settings for Sell Volume MA
#property indicator_label4 "Sell Volume MA"
#property indicator_type4 DRAW_LINE
#property indicator_color4 clrRed

//--- Input parameters
input int MAPeriod = 14; // Period for the moving average

//--- Indicator buffers
double BuyVolumeBuffer[];    // Buffer for Buy Volume
double SellVolumeBuffer[];   // Buffer for Sell Volume
double BuyVolumeMABuffer[];  // Buffer for Buy Volume Moving Average
double SellVolumeMABuffer[]; // Buffer for Sell Volume Moving Average

//+------------------------------------------------------------------+
//| Custom indicator initialization function                        |
//+------------------------------------------------------------------+
int OnInit()
{
    //
    // Attach buffers to the indicator
    SetIndexBuffer(0, BuyVolumeBuffer, INDICATOR_DATA);
    SetIndexBuffer(1, SellVolumeBuffer, INDICATOR_DATA);
    SetIndexBuffer(2, BuyVolumeMABuffer, INDICATOR_DATA);
    SetIndexBuffer(3, SellVolumeMABuffer, INDICATOR_DATA);

    //
    // Set short name for the indicator
    IndicatorSetString(INDICATOR_SHORTNAME, "Buy and Sell Volumes");

    //
    return (INIT_SUCCEEDED);
}

//+------------------------------------------------------------------+
//| Custom indicator iteration function                             |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
                const int prev_calculated,
                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[] //
)
{
    //
    // Start from the first uncalculated bar
    int start = MathMax(prev_calculated - 1, 0);

    //
    // Loop through bars
    for (int i = start; i < rates_total; i++)
    {
        //
        // Calculate Buy and Sell Volumes based on bar-level data
        double buyVolume = 0.0;
        double sellVolume = 0.0;

        //
        if (close[i] > open[i])
        {
            //
            buyVolume = (double)tick_volume[i]; // Buying pressure (bullish bar)
            sellVolume = 0.0;
        }
        else if (close[i] < open[i])
        {
            //
            sellVolume = (double)tick_volume[i]; // Selling pressure (bearish bar)
            buyVolume = 0.0;
        }
        else
        {
            //
            // Neutral bar: split volume equally between buy and sell
            buyVolume = tick_volume[i] / 2.0;
            sellVolume = tick_volume[i] / 2.0;
        }

        //
        // Store Buy and Sell Volumes in their respective buffers
        BuyVolumeBuffer[i] = buyVolume;
        SellVolumeBuffer[i] = sellVolume;

        //
        // Calculate Moving Averages for Buy and Sell Volumes
        if (i >= MAPeriod - 1)
        {
            //
            // Calculate Simple Moving Average for Buy Volume
            double buySum = 0.0;
            for (int j = 0; j < MAPeriod; j++)
                buySum += BuyVolumeBuffer[i - j];
            BuyVolumeMABuffer[i] = buySum / MAPeriod;

            //
            // Calculate Simple Moving Average for Sell Volume
            double sellSum = 0.0;
            for (int j = 0; j < MAPeriod; j++)
                sellSum += SellVolumeBuffer[i - j];
            SellVolumeMABuffer[i] = sellSum / MAPeriod;
        }
        else
        {
            //
            // Not enough data for MA
            BuyVolumeMABuffer[i] = EMPTY_VALUE;
            SellVolumeMABuffer[i] = EMPTY_VALUE;
        }
    }

    //
    // Normalize all values between 0 and 100
    // NormalizeValues(rates_total);

    //
    return (rates_total);
}

//+------------------------------------------------------------------+
//| Normalize all values between 0 and 100                          |
//+------------------------------------------------------------------+
void NormalizeValues(int rates_total)
{
    //
    // Find the maximum and minimum values across all buffers
    double maxValue = 0.0;
    double minValue = DBL_MAX;

    //
    for (int i = 0; i < rates_total; i++)
    {
        //
        if (BuyVolumeBuffer[i] != EMPTY_VALUE && BuyVolumeBuffer[i] > maxValue)
            maxValue = BuyVolumeBuffer[i];
        if (SellVolumeBuffer[i] != EMPTY_VALUE && SellVolumeBuffer[i] > maxValue)
            maxValue = SellVolumeBuffer[i];
        if (BuyVolumeMABuffer[i] != EMPTY_VALUE && BuyVolumeMABuffer[i] > maxValue)
            maxValue = BuyVolumeMABuffer[i];
        if (SellVolumeMABuffer[i] != EMPTY_VALUE && SellVolumeMABuffer[i] > maxValue)
            maxValue = SellVolumeMABuffer[i];

        //
        if (BuyVolumeBuffer[i] != EMPTY_VALUE && BuyVolumeBuffer[i] < minValue)
            minValue = BuyVolumeBuffer[i];
        if (SellVolumeBuffer[i] != EMPTY_VALUE && SellVolumeBuffer[i] < minValue)
            minValue = SellVolumeBuffer[i];
        if (BuyVolumeMABuffer[i] != EMPTY_VALUE && BuyVolumeMABuffer[i] < minValue)
            minValue = BuyVolumeMABuffer[i];
        if (SellVolumeMABuffer[i] != EMPTY_VALUE && SellVolumeMABuffer[i] < minValue)
            minValue = SellVolumeMABuffer[i];
    }

    //
    // Avoid division by zero
    if (maxValue == minValue)
        return;

    //
    // Normalize all values
    for (int i = 0; i < rates_total; i++)
    {
        //
        if (BuyVolumeBuffer[i] != EMPTY_VALUE)
            BuyVolumeBuffer[i] = ((BuyVolumeBuffer[i] - minValue) / (maxValue - minValue)) * 100.0;

        if (SellVolumeBuffer[i] != EMPTY_VALUE)
            SellVolumeBuffer[i] = ((SellVolumeBuffer[i] - minValue) / (maxValue - minValue)) * 100.0;

        if (BuyVolumeMABuffer[i] != EMPTY_VALUE)
            BuyVolumeMABuffer[i] = ((BuyVolumeMABuffer[i] - minValue) / (maxValue - minValue)) * 100.0;

        if (SellVolumeMABuffer[i] != EMPTY_VALUE)
            SellVolumeMABuffer[i] = ((SellVolumeMABuffer[i] - minValue) / (maxValue - minValue)) * 100.0;
    }
}
//+------------------------------------------------------------------+