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mql5/Indicators/MyIndicators/Chart_HeikinAshi.mq5
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//+------------------------------------------------------------------+
//| Chart_HeikinAshi.mq5 |
//| Copyright 2026, xxxxxxxx|
//+------------------------------------------------------------------+
#property copyright "Copyright 2026, xxxxxxxx"
#property version "4.00" // Enterprise Refactor: 5-Buffer Fused O(1) Architecture
#property description "Ultra-High Performance Heikin Ashi Candlestick Stream."
#property description "Optimized for high-density multi-chart execution with zero memory redundancy."
#property indicator_chart_window
#property indicator_buffers 5 // 4 HA Candles + 1 Color Index (45% memory reduction)
#property indicator_plots 1
//--- Plot: Heikin Ashi Candles
#property indicator_label1 "HA Open;HA High;HA Low;HA Close"
#property indicator_type1 DRAW_COLOR_CANDLES
#property indicator_color1 clrCornflowerBlue, clrChocolate
#property indicator_style1 STYLE_SOLID
#property indicator_width1 1
//--- Include the strictly optimized calculation engine
#include <MyIncludes\HeikinAshi_Tools.mqh>
//--- Indicator Output Buffers
double BufferHA_Open[];
double BufferHA_High[];
double BufferHA_Low[];
double BufferHA_Close[];
double BufferColor[];
//--- Static Global Engine Instance (Zero heap allocation, zero pointer overhead)
CHeikinAshi_Calculator g_ha_calculator;
//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
int OnInit()
{
// Map 5 Essential Indicator Buffers
SetIndexBuffer(0, BufferHA_Open, INDICATOR_DATA);
SetIndexBuffer(1, BufferHA_High, INDICATOR_DATA);
SetIndexBuffer(2, BufferHA_Low, INDICATOR_DATA);
SetIndexBuffer(3, BufferHA_Close, INDICATOR_DATA);
SetIndexBuffer(4, BufferColor, INDICATOR_COLOR_INDEX);
// Strictly enforce chronological non-series indexing (0 = oldest bar)
ArraySetAsSeries(BufferHA_Open, false);
ArraySetAsSeries(BufferHA_High, false);
ArraySetAsSeries(BufferHA_Low, false);
ArraySetAsSeries(BufferHA_Close, false);
ArraySetAsSeries(BufferColor, false);
// Configure Plot Setup
PlotIndexSetInteger(0, PLOT_DRAW_BEGIN, 1);
PlotIndexSetDouble(0, PLOT_EMPTY_VALUE, EMPTY_VALUE);
IndicatorSetInteger(INDICATOR_DIGITS, _Digits);
IndicatorSetString(INDICATOR_SHORTNAME, "Heikin Ashi Pro");
return(INIT_SUCCEEDED);
}
//+------------------------------------------------------------------+
//| Custom indicator iteration function |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
const int prev_calculated,
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(rates_total < 2)
return(0);
// Enforce chronological indexing on input arrays
ArraySetAsSeries(open, false);
ArraySetAsSeries(high, false);
ArraySetAsSeries(low, false);
ArraySetAsSeries(close, false);
// Incremental start index calculation (O(1) execution)
int start_index = (prev_calculated > 0) ? (prev_calculated - 1) : 0;
// Single-Pass Fused Execution: Computes OHLC and Color Index in a single loop
g_ha_calculator.Calculate(rates_total, start_index, open, high, low, close,
BufferHA_Open, BufferHA_High, BufferHA_Low, BufferHA_Close,
BufferColor);
return(rates_total);
}
//+------------------------------------------------------------------+
//+------------------------------------------------------------------+