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mql5/Indicators/MyIndicators/Bollinger_Bands_Pro.mq5
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2025-12-07 16:55:00 +01:00

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//+------------------------------------------------------------------+
//| Bollinger_Bands_Pro.mq5 |
//| Copyright 2025, xxxxxxxx|
//+------------------------------------------------------------------+
#property copyright "Copyright 2025, xxxxxxxx"
#property version "1.10" // Optimized for incremental calculation
#property description "A professional, unified Bollinger Bands indicator with a selectable"
#property description "price source, including a full range of Heikin Ashi prices."
#property indicator_chart_window
#property indicator_buffers 3
#property indicator_plots 3
#include <MyIncludes\Bollinger_Bands_Calculator.mqh>
//--- Plot 1: Upper Band
#property indicator_label1 "Upper Band"
#property indicator_type1 DRAW_LINE
#property indicator_color1 clrOliveDrab
#property indicator_style1 STYLE_DOT
#property indicator_width1 1
//--- Plot 2: Lower Band
#property indicator_label2 "Lower Band"
#property indicator_type2 DRAW_LINE
#property indicator_color2 clrOliveDrab
#property indicator_style2 STYLE_DOT
#property indicator_width2 1
//--- Plot 3: Center Line (MA)
#property indicator_label3 "Centerline"
#property indicator_type3 DRAW_LINE
#property indicator_color3 clrOliveDrab
#property indicator_style3 STYLE_SOLID
#property indicator_width3 1
//--- Input Parameters ---
input int InpPeriod = 20;
input double InpDeviation = 2.0;
input ENUM_MA_METHOD InpMethodMA = MODE_SMA;
input ENUM_APPLIED_PRICE_HA_ALL InpSourcePrice = PRICE_CLOSE_STD;
//--- Indicator Buffers ---
double BufferUpperBand[], BufferLowerBand[], BufferCenterLine[];
//--- Global calculator object (as a base class pointer) ---
CBollingerBandsCalculator *g_calculator;
//+------------------------------------------------------------------+
//| Custom indicator initialization function. |
//+------------------------------------------------------------------+
int OnInit()
{
SetIndexBuffer(0, BufferUpperBand, INDICATOR_DATA);
SetIndexBuffer(1, BufferLowerBand, INDICATOR_DATA);
SetIndexBuffer(2, BufferCenterLine, INDICATOR_DATA);
ArraySetAsSeries(BufferUpperBand, false);
ArraySetAsSeries(BufferLowerBand, false);
ArraySetAsSeries(BufferCenterLine, false);
//--- Dynamic Calculator Instantiation ---
if(InpSourcePrice <= PRICE_HA_CLOSE) // Check if it's any of the HA prices
{
g_calculator = new CBollingerBandsCalculator_HA();
IndicatorSetString(INDICATOR_SHORTNAME, StringFormat("BB Pro HA(%d, %.2f)", InpPeriod, InpDeviation));
}
else
{
g_calculator = new CBollingerBandsCalculator();
IndicatorSetString(INDICATOR_SHORTNAME, StringFormat("BB Pro(%d, %.2f)", InpPeriod, InpDeviation));
}
if(CheckPointer(g_calculator) == POINTER_INVALID ||
!g_calculator.Init(InpPeriod, InpDeviation, InpMethodMA))
{
Print("Failed to initialize Bollinger Bands Calculator.");
return(INIT_FAILED);
}
PlotIndexSetInteger(0, PLOT_DRAW_BEGIN, InpPeriod - 1);
PlotIndexSetInteger(1, PLOT_DRAW_BEGIN, InpPeriod - 1);
PlotIndexSetInteger(2, PLOT_DRAW_BEGIN, InpPeriod - 1);
return(INIT_SUCCEEDED);
}
//+------------------------------------------------------------------+
//| Custom indicator deinitialization function. |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
{
if(CheckPointer(g_calculator) != POINTER_INVALID)
delete g_calculator;
}
//+------------------------------------------------------------------+
//| Custom indicator calculation function |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
const int prev_calculated, // <--- Now used!
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[])
{
if(CheckPointer(g_calculator) != POINTER_INVALID)
{
ENUM_APPLIED_PRICE price_type;
if(InpSourcePrice <= PRICE_HA_CLOSE)
price_type = (ENUM_APPLIED_PRICE)(-(int)InpSourcePrice);
else
price_type = (ENUM_APPLIED_PRICE)InpSourcePrice;
//--- Delegate calculation with prev_calculated optimization
g_calculator.Calculate(rates_total, prev_calculated, price_type, open, high, low, close,
BufferCenterLine, BufferUpperBand, BufferLowerBand);
}
return(rates_total);
}
//+------------------------------------------------------------------+
//+------------------------------------------------------------------+