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//+------------------------------------------------------------------+
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//| HMA_MTF_Pro.mq5 |
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//| Copyright 2025, xxxxxxxx|
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//+------------------------------------------------------------------+
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#property copyright "Copyright 2025, xxxxxxxx"
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#property version "4.20" // Unified MTF Engine Pattern
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#property description "Multi-Timeframe (MTF) Hull Moving Average (HMA)."
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#property indicator_chart_window
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#property indicator_buffers 1
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#property indicator_plots 1
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#property indicator_type1 DRAW_LINE
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#property indicator_color1 clrDeepPink
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#property indicator_style1 STYLE_SOLID
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#property indicator_width1 2
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#property indicator_label1 "HMA MTF"
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//--- Include the calculator engine ---
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#include <MyIncludes\HMA_Calculator.mqh>
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//--- Input Parameters ---
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input group "Timeframe Settings"
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input ENUM_TIMEFRAMES InpUpperTimeframe = PERIOD_H1; // Target Timeframe
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input group "HMA Settings"
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input int InpPeriodHMA = 14; // HMA Period
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input ENUM_APPLIED_PRICE_HA_ALL InpSourcePrice = PRICE_CLOSE_STD; // Price Source
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//--- Indicator Buffers ---
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double BufferHMA_MTF[];
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//--- MTF Globals (State & Data) ---
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double g_htf_buffer[]; // Internal buffer for HTF calculation results
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int g_htf_prev_calculated = 0;
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double g_buf_open[], g_buf_high[], g_buf_low[], g_buf_close[]; // HTF Price Data
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//--- Global variables ---
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CHMACalculator *g_calculator;
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bool g_is_mtf_mode = false;
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ENUM_TIMEFRAMES g_calc_timeframe;
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//+------------------------------------------------------------------+
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//| OnInit |
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//+------------------------------------------------------------------+
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int OnInit()
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{
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//--- 1. Resolve Timeframe
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g_calc_timeframe = InpUpperTimeframe;
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if(g_calc_timeframe == PERIOD_CURRENT)
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g_calc_timeframe = (ENUM_TIMEFRAMES)Period();
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if(g_calc_timeframe < Period())
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{
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PrintFormat("Error: Target timeframe (%s) must be >= current timeframe (%s).",
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EnumToString(g_calc_timeframe), EnumToString(Period()));
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return(INIT_FAILED);
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}
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g_is_mtf_mode = (g_calc_timeframe > Period());
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//--- 2. Setup Buffers
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SetIndexBuffer(0, BufferHMA_MTF, INDICATOR_DATA);
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ArraySetAsSeries(BufferHMA_MTF, false); // Standard indexing
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PlotIndexSetDouble(0, PLOT_EMPTY_VALUE, EMPTY_VALUE);
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//--- 3. Initialize Calculator
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if(InpSourcePrice <= PRICE_HA_CLOSE)
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g_calculator = new CHMACalculator_HA();
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else
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g_calculator = new CHMACalculator();
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if(CheckPointer(g_calculator) == POINTER_INVALID || !g_calculator.Init(InpPeriodHMA))
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{
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Print("Failed to initialize HMA Calculator.");
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return(INIT_FAILED);
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}
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//--- 4. Set Shortname
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string type = (InpSourcePrice <= PRICE_HA_CLOSE) ? " HA" : "";
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string tf_str = g_is_mtf_mode ? (" " + EnumToString(g_calc_timeframe)) : "";
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IndicatorSetString(INDICATOR_SHORTNAME, StringFormat("HMA%s%s(%d)", type, tf_str, InpPeriodHMA));
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// Calculate draw begin based on HMA formula lag
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int period_sqrt = (int)MathMax(1, MathRound(MathSqrt(InpPeriodHMA)));
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PlotIndexSetInteger(0, PLOT_DRAW_BEGIN, InpPeriodHMA + period_sqrt - 2);
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IndicatorSetInteger(INDICATOR_DIGITS, _Digits);
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return(INIT_SUCCEEDED);
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}
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//+------------------------------------------------------------------+
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//| OnDeinit |
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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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//| OnCalculate |
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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 < InpPeriodHMA)
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return(0);
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ENUM_APPLIED_PRICE price_type = (InpSourcePrice <= PRICE_HA_CLOSE) ?
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(ENUM_APPLIED_PRICE)(-(int)InpSourcePrice) :
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(ENUM_APPLIED_PRICE)InpSourcePrice;
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//================================================================
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// MODE 1: Current Timeframe (Standard)
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//================================================================
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if(!g_is_mtf_mode)
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{
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g_calculator.Calculate(rates_total, prev_calculated, price_type, open, high, low, close, BufferHMA_MTF);
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return(rates_total);
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}
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//================================================================
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// MODE 2: Multi-Timeframe (MTF Engine)
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//================================================================
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//--- A. Get HTF Data Count
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int htf_rates_total = iBars(_Symbol, g_calc_timeframe);
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if(htf_rates_total < InpPeriodHMA)
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return(0);
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//--- B. Reset HTF State if Full Recalculation needed
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if(prev_calculated == 0)
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{
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g_htf_prev_calculated = 0;
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ArrayInitialize(BufferHMA_MTF, EMPTY_VALUE);
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}
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//--- C. Fetch HTF Price Data
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if(CopyOpen(_Symbol, g_calc_timeframe, 0, htf_rates_total, g_buf_open) < 0 ||
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CopyHigh(_Symbol, g_calc_timeframe, 0, htf_rates_total, g_buf_high) < 0 ||
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CopyLow(_Symbol, g_calc_timeframe, 0, htf_rates_total, g_buf_low) < 0 ||
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CopyClose(_Symbol, g_calc_timeframe, 0, htf_rates_total, g_buf_close) < 0)
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{
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return(0); // Data not ready
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}
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//--- D. Resize HTF Buffer
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if(ArraySize(g_htf_buffer) != htf_rates_total)
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ArrayResize(g_htf_buffer, htf_rates_total);
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//--- E. Calculate HTF HMA (Incremental)
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// Step back 1 bar to ensure the open candle is always updated
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int htf_calc_start = (g_htf_prev_calculated > 0) ? g_htf_prev_calculated - 1 : 0;
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g_calculator.Calculate(htf_rates_total, htf_calc_start, price_type,
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g_buf_open, g_buf_high, g_buf_low, g_buf_close,
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g_htf_buffer);
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g_htf_prev_calculated = htf_rates_total;
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//--- F. Map HTF Values to Current Chart (The "Staircase")
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// CRITICAL: Set HTF buffer as SERIES for mapping
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// This aligns index 0 with the newest bar, matching iBarShift behavior.
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ArraySetAsSeries(g_htf_buffer, true);
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// Ensure 'time' array is NOT series for our loop (0 = Oldest)
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ArraySetAsSeries(time, false);
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int limit = (prev_calculated > 0) ? prev_calculated - 1 : 0;
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for(int i = limit; i < rates_total; i++)
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{
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datetime current_time = time[i];
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// iBarShift returns the index relative to the newest bar (0 = Newest)
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int htf_index = iBarShift(_Symbol, g_calc_timeframe, current_time, false);
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if(htf_index >= 0 && htf_index < htf_rates_total)
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{
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BufferHMA_MTF[i] = g_htf_buffer[htf_index];
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}
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else
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{
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BufferHMA_MTF[i] = EMPTY_VALUE;
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}
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}
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// CRITICAL: Restore HTF buffer to non-series for next calculation cycle
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ArraySetAsSeries(g_htf_buffer, false);
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return(rates_total);
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}
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//+------------------------------------------------------------------+
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//+------------------------------------------------------------------+
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