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Toh4iem9
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//+------------------------------------------------------------------+
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//| Bollinger_Bands_PercentB.mq5 |
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//| Copyright 2025, xxxxxxxx|
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//| |
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//+------------------------------------------------------------------+
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#property copyright "Copyright 2025, xxxxxxxx"
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#property version "1.00"
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#property description "Bollinger Bands %B. Shows the position of price relative to the bands."
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#property description "Includes a selectable price source with Heikin Ashi options."
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#property indicator_separate_window
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#property indicator_buffers 1
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#property indicator_plots 1
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#property indicator_level1 0.0
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#property indicator_level2 0.5
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#property indicator_level3 1.0
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#property indicator_levelstyle STYLE_DOT
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#include <MyIncludes\Bollinger_Bands_Calculator.mqh>
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//--- Plot 1: %B Line
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#property indicator_label1 "%B"
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#property indicator_type1 DRAW_LINE
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#property indicator_color1 clrTeal
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#property indicator_style1 STYLE_SOLID
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#property indicator_width1 1
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//--- Custom Enum for Price Source, including Heikin Ashi
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enum ENUM_APPLIED_PRICE_HA_ALL
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{
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//--- Heikin Ashi Prices
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PRICE_HA_CLOSE = -1,
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PRICE_HA_OPEN = -2,
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PRICE_HA_HIGH = -3,
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PRICE_HA_LOW = -4,
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PRICE_HA_MEDIAN = -5,
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PRICE_HA_TYPICAL = -6,
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PRICE_HA_WEIGHTED = -7,
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//--- Standard Prices
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PRICE_CLOSE_STD = PRICE_CLOSE,
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PRICE_OPEN_STD = PRICE_OPEN,
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PRICE_HIGH_STD = PRICE_HIGH,
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PRICE_LOW_STD = PRICE_LOW,
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PRICE_MEDIAN_STD = PRICE_MEDIAN,
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PRICE_TYPICAL_STD = PRICE_TYPICAL,
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PRICE_WEIGHTED_STD = PRICE_WEIGHTED
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};
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//--- Input Parameters ---
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input int InpPeriod = 20;
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input double InpDeviation = 2.0;
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input ENUM_MA_METHOD InpMethodMA = MODE_SMA;
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input ENUM_APPLIED_PRICE_HA_ALL InpSourcePrice = PRICE_CLOSE_STD;
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//--- Indicator Buffers ---
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double BufferPercentB[];
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double BufferPrice[];
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//--- Global calculator object ---
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CBollingerBandsCalculator *g_calculator;
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//+------------------------------------------------------------------+
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//| Custom indicator initialization function. |
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//+------------------------------------------------------------------+
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int OnInit()
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{
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SetIndexBuffer(0, BufferPercentB, INDICATOR_DATA);
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ArraySetAsSeries(BufferPercentB, false);
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//--- Dynamic Calculator Instantiation ---
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if(InpSourcePrice <= PRICE_HA_CLOSE)
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{
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g_calculator = new CBollingerBandsCalculator_HA();
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IndicatorSetString(INDICATOR_SHORTNAME, StringFormat("%%B HA(%d, %.2f)", InpPeriod, InpDeviation));
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}
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else
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{
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g_calculator = new CBollingerBandsCalculator();
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IndicatorSetString(INDICATOR_SHORTNAME, StringFormat("%%B(%d, %.2f)", InpPeriod, InpDeviation));
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}
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if(CheckPointer(g_calculator) == POINTER_INVALID ||
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!g_calculator.Init(InpPeriod, InpDeviation, InpMethodMA))
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{
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Print("Failed to initialize Bollinger Bands Calculator.");
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return(INIT_FAILED);
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}
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PlotIndexSetInteger(0, PLOT_DRAW_BEGIN, InpPeriod - 1);
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IndicatorSetInteger(INDICATOR_DIGITS, 3);
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return(INIT_SUCCEEDED);
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}
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//+------------------------------------------------------------------+
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//| Custom indicator deinitialization function. |
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//+------------------------------------------------------------------+
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void OnDeinit(const int reason)
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{
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if(CheckPointer(g_calculator) != POINTER_INVALID)
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delete g_calculator;
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}
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//+------------------------------------------------------------------+
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//| Custom indicator iteration function. |
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//+------------------------------------------------------------------+
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int OnCalculate(const int rates_total, const int, const datetime&[], const double &open[], const double &high[], const double &low[], const double &close[], const long&[], const long&[], const int&[])
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{
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if(CheckPointer(g_calculator) == POINTER_INVALID)
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return 0;
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//--- Step 1: Run the main calculation to get the band components
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double upper_band[], lower_band[], ma_line[];
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ArrayResize(upper_band, rates_total);
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ArrayResize(lower_band, rates_total);
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ArrayResize(ma_line, rates_total);
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ENUM_APPLIED_PRICE price_type;
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if(InpSourcePrice <= PRICE_HA_CLOSE)
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price_type = (ENUM_APPLIED_PRICE)(-(int)InpSourcePrice);
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else
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price_type = (ENUM_APPLIED_PRICE)InpSourcePrice;
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g_calculator.Calculate(rates_total, price_type, open, high, low, close,
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ma_line, upper_band, lower_band);
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//--- Step 2: Calculate the source price array that was used by the calculator
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ArrayResize(BufferPrice, rates_total);
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if(InpSourcePrice <= PRICE_HA_CLOSE)
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{
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// For HA, we need to recalculate the HA prices to get the correct source
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CHeikinAshi_Calculator ha_calc;
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double ha_open[], ha_high[], ha_low[], ha_close[];
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ArrayResize(ha_open, rates_total);
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ArrayResize(ha_high, rates_total);
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ArrayResize(ha_low, rates_total);
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ArrayResize(ha_close, rates_total);
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ha_calc.Calculate(rates_total, open, high, low, close, ha_open, ha_high, ha_low, ha_close);
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switch(price_type)
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{
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case PRICE_CLOSE:
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ArrayCopy(BufferPrice, ha_close, 0, 0, rates_total);
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break;
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case PRICE_OPEN:
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ArrayCopy(BufferPrice, ha_open, 0, 0, rates_total);
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break;
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case PRICE_HIGH:
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ArrayCopy(BufferPrice, ha_high, 0, 0, rates_total);
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break;
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case PRICE_LOW:
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ArrayCopy(BufferPrice, ha_low, 0, 0, rates_total);
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break;
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case PRICE_MEDIAN:
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for(int i=0; i<rates_total; i++)
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BufferPrice[i] = (ha_high[i]+ha_low[i])/2.0;
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break;
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case PRICE_TYPICAL:
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for(int i=0; i<rates_total; i++)
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BufferPrice[i] = (ha_high[i]+ha_low[i]+ha_close[i])/3.0;
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break;
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case PRICE_WEIGHTED:
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for(int i=0; i<rates_total; i++)
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BufferPrice[i] = (ha_high[i]+ha_low[i]+ha_close[i]+ha_close[i])/4.0;
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break;
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}
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}
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else
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{
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// For standard prices, we can just copy the relevant array
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switch(price_type)
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{
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case PRICE_CLOSE:
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ArrayCopy(BufferPrice, close, 0, 0, rates_total);
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break;
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case PRICE_OPEN:
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ArrayCopy(BufferPrice, open, 0, 0, rates_total);
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break;
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case PRICE_HIGH:
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ArrayCopy(BufferPrice, high, 0, 0, rates_total);
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break;
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case PRICE_LOW:
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ArrayCopy(BufferPrice, low, 0, 0, rates_total);
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break;
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case PRICE_MEDIAN:
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for(int i=0; i<rates_total; i++)
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BufferPrice[i] = (high[i]+low[i])/2.0;
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break;
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case PRICE_TYPICAL:
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for(int i=0; i<rates_total; i++)
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BufferPrice[i] = (high[i]+low[i]+close[i])/3.0;
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break;
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case PRICE_WEIGHTED:
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for(int i=0; i<rates_total; i++)
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BufferPrice[i] = (high[i]+low[i]+close[i]+close[i])/4.0;
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break;
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}
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}
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//--- Step 3: Calculate the final %B value
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for(int i = InpPeriod - 1; i < rates_total; i++)
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{
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double band_width = upper_band[i] - lower_band[i];
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if(band_width != 0)
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{
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BufferPercentB[i] = (BufferPrice[i] - lower_band[i]) / band_width;
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}
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else
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{
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BufferPercentB[i] = 0.5; // If width is zero, price is at the centerline
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}
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}
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return(rates_total);
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}
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//+------------------------------------------------------------------+
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//+------------------------------------------------------------------+
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