diff --git a/Indicators/MyIndicators/TSI_Combo_MTF_Pro.mq5 b/Indicators/MyIndicators/TSI_Combo_MTF_Pro.mq5
new file mode 100644
index 0000000..9716cf4
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+++ b/Indicators/MyIndicators/TSI_Combo_MTF_Pro.mq5
@@ -0,0 +1,203 @@
+//+------------------------------------------------------------------+
+//|                                           TSI_Combo_MTF_Pro.mq5  |
+//|                                          Copyright 2026, xxxxxxxx|
+//+------------------------------------------------------------------+
+#property copyright "Copyright 2026, xxxxxxxx"
+#property version   "1.10" // O(1) Incremental HTF Optimization
+#property description "True Strength Index Combo (Multi-Timeframe)."
+#property description "Displays Main Line, Signal Line, and Histogram from a Higher Timeframe."
+
+#property indicator_separate_window
+#property indicator_buffers 3
+#property indicator_plots   3
+
+//--- Plot 1: Histogram (Background)
+#property indicator_label1  "Oscillator"
+#property indicator_type1   DRAW_HISTOGRAM
+#property indicator_color1  clrSilver
+#property indicator_style1  STYLE_SOLID
+#property indicator_width1  1
+
+//--- Plot 2: TSI Line
+#property indicator_label2  "TSI"
+#property indicator_type2   DRAW_LINE
+#property indicator_color2  clrDodgerBlue
+#property indicator_style2  STYLE_SOLID
+#property indicator_width2  1
+
+//--- Plot 3: Signal Line
+#property indicator_label3  "Signal"
+#property indicator_type3   DRAW_LINE
+#property indicator_color3  clrOrangeRed
+#property indicator_style3  STYLE_SOLID
+#property indicator_width3  1
+
+//--- Institutional Levels
+#property indicator_level1 -50.0
+#property indicator_level2 -37.5
+#property indicator_level3 -25.0
+#property indicator_level4  25.0
+#property indicator_level5  37.5
+#property indicator_level6  50.0
+#property indicator_levelstyle STYLE_DOT
+
+#include <MyIncludes\TSI_Calculator.mqh>
+
+//--- Input Parameters ---
+input ENUM_TIMEFRAMES           InpTimeframe    = PERIOD_H1;        // Target Timeframe
+
+input group                     "TSI Calculation Settings"
+input int                       InpSlowPeriod   = 25;
+input ENUM_MA_TYPE              InpSlowMAType   = EMA;
+input int                       InpFastPeriod   = 13;
+input ENUM_MA_TYPE              InpFastMAType   = EMA;
+input ENUM_APPLIED_PRICE_HA_ALL InpSourcePrice  = PRICE_CLOSE_STD;
+
+input group                     "Signal Line Settings"
+input int                       InpSignalPeriod = 13;
+input ENUM_MA_TYPE              InpSignalMAType = EMA;
+
+//--- Indicator Buffers ---
+double    BufferOsc[];
+double    BufferTSI[];
+double    BufferSignal[];
+
+//--- Internal HTF Data Arrays ---
+double    h_open[], h_high[], h_low[], h_close[];
+datetime  h_time[];
+double    h_main[], h_sig[], h_osc[]; // Results
+
+//--- Global calculator object ---
+CTSICalculator *g_calc;
+
+//+------------------------------------------------------------------+
+//| Init                                                             |
+//+------------------------------------------------------------------+
+int OnInit()
+  {
+   if(InpTimeframe <= Period() && InpTimeframe != PERIOD_CURRENT)
+     {
+      Print("Warning: Target Timeframe should be strictly > Current Timeframe.");
+     }
+
+   SetIndexBuffer(0, BufferOsc,    INDICATOR_DATA);
+   SetIndexBuffer(1, BufferTSI,    INDICATOR_DATA);
+   SetIndexBuffer(2, BufferSignal, INDICATOR_DATA);
+
+   ArraySetAsSeries(BufferOsc,    false);
+   ArraySetAsSeries(BufferTSI,    false);
+   ArraySetAsSeries(BufferSignal, false);
+
+// Factory Logic for Heikin Ashi support
+   if(InpSourcePrice <= PRICE_HA_CLOSE)
+      g_calc = new CTSICalculator_HA();
+   else
+      g_calc = new CTSICalculator();
+
+   if(CheckPointer(g_calc) == POINTER_INVALID ||
+      !g_calc.Init(InpSlowPeriod, InpSlowMAType, InpFastPeriod, InpFastMAType, InpSignalPeriod, InpSignalMAType))
+     {
+      Print("Init Failed.");
+      return(INIT_FAILED);
+     }
+
+   string tf_name = StringSubstr(EnumToString(InpTimeframe), 7);
+   string type = (InpSourcePrice <= PRICE_HA_CLOSE) ? " HA" : "";
+   IndicatorSetString(INDICATOR_SHORTNAME, StringFormat("TSI Combo MTF %s%s(%d,%d,%d)", tf_name, type, InpSlowPeriod, InpFastPeriod, InpSignalPeriod));
+   IndicatorSetInteger(INDICATOR_DIGITS, 2);
+
+   return(INIT_SUCCEEDED);
+  }
+
+void OnDeinit(const int r) { if(CheckPointer(g_calc) != POINTER_INVALID) delete g_calc; }
+
+//+------------------------------------------------------------------+
+//| Calculate                                                        |
+//+------------------------------------------------------------------+
+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[])
+  {
+// 1. Validate HTF Data Availability
+   int htf_bars = iBars(_Symbol, InpTimeframe);
+   if(htf_bars < InpSlowPeriod + InpFastPeriod + InpSignalPeriod)
+      return 0;
+
+   int count = MathMin(htf_bars, 3000); // Limit deep history for MTF mapping
+
+   ArraySetAsSeries(h_time, false);
+   ArraySetAsSeries(h_open, false);
+   ArraySetAsSeries(h_high, false);
+   ArraySetAsSeries(h_low, false);
+   ArraySetAsSeries(h_close, false);
+
+// Fetch HTF Data
+   if(CopyTime(_Symbol, InpTimeframe, 0, count, h_time) != count)
+      return 0;
+   if(CopyOpen(_Symbol, InpTimeframe, 0, count, h_open) != count)
+      return 0;
+   if(CopyHigh(_Symbol, InpTimeframe, 0, count, h_high) != count)
+      return 0;
+   if(CopyLow(_Symbol, InpTimeframe, 0, count, h_low) != count)
+      return 0;
+   if(CopyClose(_Symbol, InpTimeframe, 0, count, h_close) != count)
+      return 0;
+
+   if(ArraySize(h_osc) != count)
+     {
+      ArrayResize(h_main, count);
+      ArrayResize(h_sig, count);
+      ArrayResize(h_osc, count);
+     }
+
+// 2. Incremental HTF Calculation (O(1) Optimization)
+   static int htf_prev_calculated = 0;
+   if(prev_calculated == 0)
+      htf_prev_calculated = 0;
+
+   ENUM_APPLIED_PRICE price_type = (InpSourcePrice <= PRICE_HA_CLOSE) ? (ENUM_APPLIED_PRICE)(-(int)InpSourcePrice) : (ENUM_APPLIED_PRICE)InpSourcePrice;
+
+   g_calc.Calculate(count, htf_prev_calculated, price_type, h_open, h_high, h_low, h_close, h_main, h_sig, h_osc);
+
+// Prepare for next tick
+   htf_prev_calculated = count - 1;
+
+// 3. Map HTF values to Current Timeframe (O(1) Incremental)
+   int start = (prev_calculated > 0) ? prev_calculated - 1 : 0;
+
+   for(int i = start; i < rates_total; i++)
+     {
+      datetime t = time[i];
+      int shift_htf = iBarShift(_Symbol, InpTimeframe, t, false);
+
+      if(shift_htf >= 0)
+        {
+         // Convert descending shift (0 = newest) to ascending chronological index
+         int idx_htf = count - 1 - shift_htf;
+
+         if(idx_htf >= 0 && idx_htf < count)
+           {
+            BufferTSI[i]    = h_main[idx_htf];
+            BufferSignal[i] = h_sig[idx_htf];
+            BufferOsc[i]    = h_osc[idx_htf];
+           }
+         else
+           {
+            BufferTSI[i]    = EMPTY_VALUE;
+            BufferSignal[i] = EMPTY_VALUE;
+            BufferOsc[i]    = EMPTY_VALUE;
+           }
+        }
+     }
+
+   return(rates_total);
+  }
+//+------------------------------------------------------------------+
+//+------------------------------------------------------------------+