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//+------------------------------------------------------------------+
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//| Gann_HiLo_HeikinAshi.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 link ""
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#property version "2.00" // Refactored for full recalculation and stability
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#property description "Gann HiLo Activator on Heikin Ashi data with selectable MA"
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#include <MovingAverages.mqh>
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#include <MyIncludes\HeikinAshi_Tools.mqh>
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//--- Indicator Window and Plot Properties ---
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#property indicator_chart_window
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#property indicator_buffers 5
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#property indicator_plots 1
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//--- Plot 1: Gann HiLo line
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#property indicator_label1 "HA_Gann_HiLo"
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#property indicator_type1 DRAW_COLOR_LINE
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#property indicator_color1 clrDodgerBlue, clrTomato
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#property indicator_style1 STYLE_SOLID
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#property indicator_width1 2
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//--- Input Parameters ---
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input int InpPeriod = 10; // Period for High/Low averages
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input ENUM_MA_METHOD InpMAMethod = MODE_SMA; // Method for High/Low averages
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//--- Indicator Buffers ---
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double BufferHA_GannHiLo[];
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double BufferColor[];
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double BufferHiAvg[];
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double BufferLoAvg[];
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double BufferTrend[];
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//--- Intermediate Heikin Ashi Buffers ---
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double ExtHaOpenBuffer[];
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double ExtHaHighBuffer[];
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double ExtHaLowBuffer[];
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double ExtHaCloseBuffer[];
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//--- Global Objects and Variables ---
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int g_ExtPeriod;
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CHeikinAshi_Calculator *g_ha_calculator; // Pointer to our Heikin Ashi 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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g_ExtPeriod = (InpPeriod < 1) ? 1 : InpPeriod;
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SetIndexBuffer(0, BufferHA_GannHiLo, INDICATOR_DATA);
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SetIndexBuffer(1, BufferColor, INDICATOR_COLOR_INDEX);
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SetIndexBuffer(2, BufferHiAvg, INDICATOR_CALCULATIONS);
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SetIndexBuffer(3, BufferLoAvg, INDICATOR_CALCULATIONS);
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SetIndexBuffer(4, BufferTrend, INDICATOR_CALCULATIONS);
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ArraySetAsSeries(BufferHA_GannHiLo, false);
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ArraySetAsSeries(BufferColor, false);
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ArraySetAsSeries(BufferHiAvg, false);
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ArraySetAsSeries(BufferLoAvg, false);
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ArraySetAsSeries(BufferTrend, false);
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IndicatorSetInteger(INDICATOR_DIGITS, _Digits);
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PlotIndexSetInteger(0, PLOT_DRAW_BEGIN, g_ExtPeriod);
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IndicatorSetString(INDICATOR_SHORTNAME, StringFormat("HA_Gann_HiLo(%d)", g_ExtPeriod));
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//--- Create the calculator instance
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g_ha_calculator = new CHeikinAshi_Calculator();
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if(CheckPointer(g_ha_calculator) == POINTER_INVALID)
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{
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Print("Error creating CHeikinAshi_Calculator object");
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return(INIT_FAILED);
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}
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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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//--- Free the calculator object to prevent memory leaks
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if(CheckPointer(g_ha_calculator) != POINTER_INVALID)
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{
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delete g_ha_calculator;
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g_ha_calculator = NULL;
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}
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}
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//+------------------------------------------------------------------+
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//| Gann HiLo on Heikin Ashi calculation function. |
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//+------------------------------------------------------------------+
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int OnCalculate(const int rates_total,
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const int prev_calculated,
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const datetime &time[],
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const double &open[],
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const double &high[],
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const double &low[],
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const double &close[],
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const long &tick_volume[],
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const long &volume[],
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const int &spread[])
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{
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if(rates_total <= g_ExtPeriod)
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return(0);
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//--- Resize intermediate buffers
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ArrayResize(ExtHaOpenBuffer, rates_total);
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ArrayResize(ExtHaHighBuffer, rates_total);
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ArrayResize(ExtHaLowBuffer, rates_total);
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ArrayResize(ExtHaCloseBuffer, rates_total);
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//--- STEP 1: Calculate Heikin Ashi bars
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g_ha_calculator.Calculate(rates_total, open, high, low, close,
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ExtHaOpenBuffer, ExtHaHighBuffer, ExtHaLowBuffer, ExtHaCloseBuffer);
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//--- STEP 2 & 3: Calculate MAs, determine trend, and set final value in a single loop
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for(int i = 1; i < rates_total; i++)
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{
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// Skip bars that don't have enough history for the period
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if(i < g_ExtPeriod)
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continue;
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// --- Calculate the two moving averages on HA High and HA Low ---
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switch(InpMAMethod)
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{
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case MODE_EMA:
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if(i == g_ExtPeriod) // Initialization
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{
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BufferHiAvg[i] = SimpleMA(i, g_ExtPeriod, ExtHaHighBuffer);
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BufferLoAvg[i] = SimpleMA(i, g_ExtPeriod, ExtHaLowBuffer);
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}
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else // Recursive calculation
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{
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double pr = 2.0 / (g_ExtPeriod + 1.0);
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BufferHiAvg[i] = ExtHaHighBuffer[i] * pr + BufferHiAvg[i-1] * (1.0 - pr);
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BufferLoAvg[i] = ExtHaLowBuffer[i] * pr + BufferLoAvg[i-1] * (1.0 - pr);
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}
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break;
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case MODE_SMMA:
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if(i == g_ExtPeriod) // Initialization
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{
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BufferHiAvg[i] = SimpleMA(i, g_ExtPeriod, ExtHaHighBuffer);
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BufferLoAvg[i] = SimpleMA(i, g_ExtPeriod, ExtHaLowBuffer);
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}
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else // Recursive calculation
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{
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BufferHiAvg[i] = (BufferHiAvg[i-1] * (g_ExtPeriod - 1) + ExtHaHighBuffer[i]) / g_ExtPeriod;
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BufferLoAvg[i] = (BufferLoAvg[i-1] * (g_ExtPeriod - 1) + ExtHaLowBuffer[i]) / g_ExtPeriod;
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}
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break;
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case MODE_LWMA:
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BufferHiAvg[i] = LinearWeightedMA(i, g_ExtPeriod, ExtHaHighBuffer);
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BufferLoAvg[i] = LinearWeightedMA(i, g_ExtPeriod, ExtHaLowBuffer);
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break;
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default: // MODE_SMA
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BufferHiAvg[i] = SimpleMA(i, g_ExtPeriod, ExtHaHighBuffer);
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BufferLoAvg[i] = SimpleMA(i, g_ExtPeriod, ExtHaLowBuffer);
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break;
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}
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// --- Determine trend and set the final Gann HiLo value ---
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if(ExtHaCloseBuffer[i] > BufferHiAvg[i-1]) // Trend turns up
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BufferTrend[i] = 1;
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else
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if(ExtHaCloseBuffer[i] < BufferLoAvg[i-1]) // Trend turns down
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BufferTrend[i] = -1;
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else // Trend continues
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BufferTrend[i] = BufferTrend[i-1];
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if(BufferTrend[i] == 1)
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{
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BufferHA_GannHiLo[i] = BufferLoAvg[i];
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BufferColor[i] = 0; // Blue for up trend
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}
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else
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{
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BufferHA_GannHiLo[i] = BufferHiAvg[i];
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BufferColor[i] = 1; // Tomato for down trend
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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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