/////////////////////////////////////////////////////////
//
// SaherElm IT Center MQL5 OrderBlock Detector Oscillator
// ------------------------------------------------------
// Name: XOBD
// Description: detect Order Blocks based on Swings ...
//
//
// Maintainer:
// ------------
// Hadi Khazaee Asl (hadi_khazaee_asl@yahoo.com)
//
//////////////////////////////////////////////////////
//
// Global Properties ...
#property copyright "Copyright 2023, SaherElm IT Center"
#property link "https://saherelm.ir"
#property version "1.00"
#property description "SaherElm XOBD Oscillator"
#property strict

//
// START Constants ...
//

#define ShortName "XOBD"

//
// END Constants ...
//

//
// START Inputs ...
//

//
input int length = 288; // Market Length

//
// START Inputs ...
//

//
// Includes Logging Library ...
#include "../Libraries/x-saherelm.log.lib.mq5";

//
// Include Common and Models Library ...
#include "../Libraries/x-saherelm.common.lib.mq5";

//
// START Buffers ...
//

//
#property indicator_separate_window

//
#property indicator_buffers 3
#property indicator_plots 3

//
#define swingHighBufferIndex 0
#define swingLowBufferIndex 1
#define signalBufferIndex 2

//
double swingHighBuffer[];
double swingLowBuffer[];
double signalBuffer[];

//
#property indicator_label1 "XSwing High"
#property indicator_type1 DRAW_LINE
#property indicator_color1 clrAqua
#property indicator_style1 STYLE_SOLID
#property indicator_width1 1

//
#property indicator_label2 "XSwing Low"
#property indicator_type2 DRAW_LINE
#property indicator_color2 clrFuchsia
#property indicator_style2 STYLE_SOLID
#property indicator_width2 1

//
#property indicator_label3 "XSignal"
#property indicator_type3 DRAW_LINE
#property indicator_color3 clrGold
#property indicator_style3 STYLE_DOT
#property indicator_width3 1

//
// END Buffers ...
//

//
// START Global Definitions: Variables, Properties and etc ...
//

//
// END Global Definitions: Variables, Properties and etc ...
//

//
// START Event Handlers ...
//
//
// Initialization ...
int OnInit()
{
    //
    // Validate Inputs ...
    if (!ValidateInputs())
    {
        return INIT_PARAMETERS_INCORRECT;
    }

    //
    logTag = ShortName;

    //
    // Define Index Buffers ...
    DefineBuffers();

    //
    // Set Indicator ShortName ...
    SetIndicatorName();

    //
    // Init Succeed ...
    return INIT_SUCCEEDED;
}

//
// DeInitialization ...
void OnDeinit(const int reason)
{
    //
    // REASON_PROGRAM 0 The EA has stopped working calling the ExpertRemove() function
    // REASON_REMOVE 1 Program removed from a chart
    // REASON_RECOMPILE 2 Program recompiled
    // REASON_CHARTCHANGE 3 A symbol or a chart period is changed
    // REASON_CHARTCLOSE 4 Chart closed
    // REASON_PARAMETERS 5 Inputs changed by a user
    // REASON_ACCOUNT 6 Another account has been activated or reconnection to the trade server has occurred due to changes in the account settings
    // REASON_TEMPLATE 7 Another chart template applied
    // REASON_INITFAILED 8 The OnInit() handler returned a non-zero value
    // REASON_CLOSE 9 Terminal closed

    //
    // Here we can handle De Initialization Reasons ...
}

//
// Calculations ...
//
// Calculating what we want ...
int OnCalculate(
    //
    // total Candles on chart ...
    const int rates_total,
    //
    // total calculated Candles on charts ...
    const int prev_calculated,
    //
    // history of Candles Open Time ...
    const datetime &time[],
    //
    // history of Candles Open Price ...
    const double &open[],
    //
    // history of Candles High Price ...
    const double &high[],
    //
    // history of Candles Low Price ...
    const double &low[],
    //
    // history of Candles Close Price ...
    const double &close[],
    //
    // history of Tick Volumes on Candle ...
    const long &tick_volume[],
    //
    // history of Trade Volumes ...
    const long &volume[],
    //
    // history of Candles Spread Price ...
    const int &spread[])
{
    //
    // Prepare Buffers ...
    ArraySetAsSeries(time, true);
    ArraySetAsSeries(open, true);
    ArraySetAsSeries(high, true);
    ArraySetAsSeries(low, true);
    ArraySetAsSeries(close, true);
    ArraySetAsSeries(tick_volume, true);
    ArraySetAsSeries(volume, true);
    ArraySetAsSeries(spread, true);

    //
    // this counts Available Bars ...
    int limit;

    //
    // because in some cases we may have more than one input for
    // calculation and we must prevent any calculation
    // untill we pass the biggest input length, here we get max Input length
    // and then wait until pass it ...
    int maxLength = MathMax(0, length);

    //
    limit = prev_calculated < maxLength ? rates_total - (maxLength + 1) : rates_total - prev_calculated;

    //
    // Main Loop ...
    for (int i = limit; i >= 0 && !IsStopped(); i--)
    {
        //
        CalculateBuffers(i);
    }

    //
    return rates_total;
}
//
// END Event Handlers ...
//

//
// START Functions ...
//
//
// Validate Input Args for Initialization ...
bool ValidateInputs()
{
    //
    bool result = false;

    //
    // Validate Args ...
    if (length >= 2)
    {
        result = true;
    }

    //
    return result;
}

//
// Define Indexes and Styles ...
void DefineBuffers()
{
    //
    // Swing High ...
    string swingHighBufferLabel = ShortName + " Swing H (" + (string) length + ")";
    ArraySetAsSeries(swingHighBuffer, true);
    SetIndexBuffer(swingHighBufferIndex, swingHighBuffer, INDICATOR_DATA);
    PlotIndexSetInteger(swingHighBufferIndex, PLOT_DRAW_BEGIN, length);
    PlotIndexSetString(swingHighBufferIndex, PLOT_LABEL, swingHighBufferLabel);

    //
    // Swing Low ...
    string swingLowBufferLabel = ShortName + " Swing L (" + (string) length + ")";
    ArraySetAsSeries(swingLowBuffer, true);
    SetIndexBuffer(swingLowBufferIndex, swingLowBuffer, INDICATOR_DATA);
    PlotIndexSetInteger(swingLowBufferIndex, PLOT_DRAW_BEGIN, length);
    PlotIndexSetString(swingLowBufferIndex, PLOT_LABEL, swingLowBufferLabel);

    //
    // Signal ...
    string signalBufferLabel = ShortName + " Signal (" + (string) length + ")";
    ArraySetAsSeries(signalBuffer, true);
    SetIndexBuffer(signalBufferIndex, signalBuffer, INDICATOR_DATA);
    PlotIndexSetInteger(signalBufferIndex, PLOT_DRAW_BEGIN, length);
    PlotIndexSetString(signalBufferIndex, PLOT_LABEL, signalBufferLabel);
}

//
// Set Indicator Short Name and also we can define Buffers Labels ...
void SetIndicatorName()
{
    //
    string indicatorShortName = "";
    StringConcatenate(indicatorShortName, ShortName, " ", "( ", length, " )");

    //
    IndicatorSetString(INDICATOR_SHORTNAME, indicatorShortName);
}

//
// Calculate Buffers ...
void CalculateBuffers(int bar_index)
{
    //
    int inCycleSwingHighCount = 0;
    int inCycleSwingLowCount = 0;

    //
    // Loop Back Through Cycle ...
    for (int i = bar_index; i < bar_index + length; i++) {
        //
        ENUM_X_SWING_TYPE iSwingType = GetCandleSwing(i);
        if (iSwingType == X_NO_SWING) {
            continue;
        }

        //
        if (iSwingType == X_SWING_HIGH) {
            inCycleSwingHighCount++;
        } else if (iSwingType == X_SWING_LOW) {
            inCycleSwingLowCount++;
        }
    }

    //
    swingHighBuffer[bar_index] = inCycleSwingHighCount;
    swingLowBuffer[bar_index] = inCycleSwingLowCount;

    //
    signalBuffer[bar_index] = inCycleSwingLowCount - inCycleSwingHighCount;
}

//
// END Functions ...
//