Modify Code so that it Performs the Same as the Attached Indicator

This is a very straight forward request.

What I need is for the Bollinger Bands Buy / Sell functions below to perform the same as the indicator that is attached.

Delivery will comprise of a video / demonstration that the functions will work within an expert advisor / work in a similar manner to the indicator.

I've shared the following below:

• Photo of Indicator (ibbfill2)
• Functions Bollinger Bands Buy / Sell (these functions should match the conditions of the ibbfill2 indicator (i.e. when the Indicator shades Blue - that is the same as Bollinger Bands Buy / vice versa for Bollinger Bands Sell)
• iBandsMQL4 Function (because MT5 does not have shift / a proper way to indicate the MAIN / UPPER / LOWER Bound) I have created this function. Note if you have an alternative, feel free to replace this.

Photo of Indicator:

Functions - Bollinger Bands Buy & Sell:

bool BollingerBandsBuy(string symb)
{
    bool state = false;

    double bid = SymbolInfoDouble(symb, SYMBOL_BID);
    double ask = SymbolInfoDouble(symb, SYMBOL_ASK);
    double close = iClose(symb, PERIOD_M5, 1);

    static bool conditionMet[12]; // Array to store conditionMet for each symbol
    string symbols_group[] = {symb1, symb2, symb3, symb4, symb5, symb6, symb7, symb9, symb10, symb11, symb12 };
    int numSymbols = ArraySize(symbols_group);

    if (ArraySize(conditionMet) != numSymbols)
    {
        ArrayResize(conditionMet, numSymbols);
    }

    int symbolIndex = -1;
    for (int i = 0; i < numSymbols; i++)
    {
        if (symb == symbols_group[i])
        {
            symbolIndex = i;
            break;
        }
    }

    if (symbolIndex == -1)
    {
        Print("Symbol not found in the group.");
        return false;
    }

    //------------------------------------------------------------------------

    double iBandsMain1 = iBandsMQL4(symb, PERIOD_M15, 20, 2, 0, 1);
    double iBandsUpper1 = iBandsMQL4(symb, PERIOD_M15, 20, 2, 1, 1);
    double iBandsLower1 = iBandsMQL4(symb, PERIOD_M15, 20, 2, 2, 1);

    //------------------------------------------------------------------------

    //---------------------- Buy Condition Initial Trigger -------------------

    if (close > iBandsUpper1)
    {
        conditionMet[symbolIndex] = true;
    }
    else if (close < iBandsMain1)
    {
        conditionMet[symbolIndex] = false;
    }

    //---------------------- Condition Start ---------------------------

    if (conditionMet[symbolIndex] && ask > iBandsMain1)
    {
        state = true;
    }

    return state;
}


//-------------------------------------------------------------------------------------------------------------++

bool BollingerBandsSell(string symb)
{
    bool state = false;

    double bid = SymbolInfoDouble(symb, SYMBOL_BID);
    double ask = SymbolInfoDouble(symb, SYMBOL_ASK);
    double close = iClose(symb, PERIOD_M5, 1);

    static bool conditionMet[12]; // Array to store conditionMet for each symbol
    string symbols_group[] = {symb1, symb2, symb3, symb4, symb5, symb6, symb7, symb9, symb10, symb11, symb12 };
    int numSymbols = ArraySize(symbols_group);

    if (ArraySize(conditionMet) != numSymbols)
    {
        ArrayResize(conditionMet, numSymbols);
    }

    int symbolIndex = -1;
    for (int i = 0; i < numSymbols; i++)
    {
        if (symb == symbols_group[i])
        {
            symbolIndex = i;
            break;
        }
    }

    if (symbolIndex == -1)
    {
        Print("Symbol not found in the group.");
        return false;
    }

    //------------------------------------------------------------------------

    double iBandsMain1 = iBandsMQL4(symb, PERIOD_M15, 20, 2, 0, 1);
    double iBandsUpper1 = iBandsMQL4(symb, PERIOD_M15, 20, 2, 1, 1);
    double iBandsLower1 = iBandsMQL4(symb, PERIOD_M15, 20, 2, 2, 1);

    //------------------------------------------------------------------------

    //---------------------- Buy Condition Initial Trigger -------------------

    if (close < iBandsLower1)
    {
        conditionMet[symbolIndex] = true;
    }
    else if (close > iBandsMain1)
    {
        conditionMet[symbolIndex] = false;
    }

    //---------------------- Condition Start ---------------------------

    if (conditionMet[symbolIndex] && close < iBandsMain1)
    {
        state = true;
    }

    return state;
}

• Note: I have added a conditionMet function to this so that I can store the boolean for the first time it exceeds the Upper Bollinger Band. I need this to work with multicurrencies hence the array that contains 12 symbols.

iBands MQL4 Function:

double iBandsMQL4(string symb, ENUM_TIMEFRAMES tf, int period, double StdDeviation, int line, int shift) 
{
    ENUM_TIMEFRAMES timeframe3 = TFMigrate(tf);

    int handleBB = iBands(symb, timeframe3, period, 0, StdDeviation, PRICE_CLOSE);

    double bbUpper[], bbLower[], bbMiddle[];
    ArraySetAsSeries(bbUpper, true);
    ArraySetAsSeries(bbLower, true);
    ArraySetAsSeries(bbMiddle, true);

    CopyBuffer(handleBB, BASE_LINE, 1, shift + 1, bbMiddle);
    CopyBuffer(handleBB, UPPER_BAND, 1, shift + 1, bbUpper);
    CopyBuffer(handleBB, LOWER_BAND, 1, shift + 1, bbLower);

    double iBandsValue;

    if (line == 0)
    {
        iBandsValue = NormalizeDouble(bbMiddle[shift], SymbolInfoInteger(symb, SYMBOL_DIGITS));
    }
    else if (line == 1)
    {
        iBandsValue = NormalizeDouble(bbUpper[shift], SymbolInfoInteger(symb, SYMBOL_DIGITS));
    }
    else if (line == 2)
    {
        iBandsValue = NormalizeDouble(bbLower[shift], SymbolInfoInteger(symb, SYMBOL_DIGITS));
    }
    else
    {
        iBandsValue = 0.0; // Default value in case of invalid line parameter
    }
   
    return iBandsValue;
}