diff --git a/Indicators/MyIndicators/RVOL_Pro.mq5 b/Indicators/MyIndicators/RVOL_Pro.mq5
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+++ b/Indicators/MyIndicators/RVOL_Pro.mq5
@@ -0,0 +1,148 @@
+//+------------------------------------------------------------------+
+//|                                                    RVOL_Pro.mq5  |
+//|                   Relative Volume (RVOL) Professional Indicator  |
+//|                                       Copyright 2026, xxxxxxxx   |
+//+------------------------------------------------------------------+
+#property copyright "Copyright 2026, xxxxxxxx"
+#property version   "1.01" // Fixed compiler errors
+#property description "Displays volume as a ratio of its moving average."
+
+#property indicator_separate_window
+#property indicator_buffers 2
+#property indicator_plots   1
+
+//--- Plot Settings
+#property indicator_label1    "RVOL"
+#property indicator_type1     DRAW_COLOR_HISTOGRAM
+#property indicator_style1    STYLE_SOLID
+#property indicator_width1    2
+
+//--- Color definitions for the histogram
+#property indicator_color1    clrSilver, clrDodgerBlue, clrGold
+
+//--- Levels
+#property indicator_level1    1.5
+#property indicator_level2    2.5
+#property indicator_levelstyle STYLE_DOT
+
+//--- Include Engine
+#include <MyIncludes\RVOL_Calculator.mqh>
+
+//--- Input Parameters
+input group "Calculation Settings"
+input int               InpPeriod      = 20;      // Lookback period for average volume
+input ENUM_APPLIED_VOLUME InpVolumeType  = VOLUME_TICK; // Volume Type (Tick or Real)
+
+input group "Visual Settings"
+input double            InpLevelHigh   = 1.5;     // Level for 'High' volume
+input double            InpLevelExtreme= 2.5;     // Level for 'Extreme' volume
+input color             InpColorNormal = clrSilver;
+input color             InpColorHigh   = clrDodgerBlue;
+input color             InpColorExtreme= clrGold;
+
+//--- Buffers
+double ExtRvolBuffer[];  // Stores the calculated RVOL value
+double ExtColorBuffer[]; // Stores the color index for each bar
+
+//--- Global Calculator
+CRVOLCalculator *g_calculator;
+
+//+------------------------------------------------------------------+
+//| OnInit                                                           |
+//+------------------------------------------------------------------+
+int OnInit()
+  {
+//--- Bind buffers
+   SetIndexBuffer(0, ExtRvolBuffer, INDICATOR_DATA);
+   SetIndexBuffer(1, ExtColorBuffer, INDICATOR_COLOR_INDEX);
+
+//--- Use standard chronological array order
+   ArraySetAsSeries(ExtRvolBuffer, false);
+   ArraySetAsSeries(ExtColorBuffer, false);
+
+//--- Set Plot Properties
+   PlotIndexSetInteger(0, PLOT_DRAW_BEGIN, InpPeriod);
+
+//--- Dynamically set colors and levels from inputs
+   PlotIndexSetDouble(0, PLOT_EMPTY_VALUE, 0.0);
+
+// FIXED: Use MQL5 function for setting plot labels
+   PlotIndexSetString(0, PLOT_LABEL, StringFormat("RVOL(%d)", InpPeriod));
+   IndicatorSetString(INDICATOR_SHORTNAME, StringFormat("RVOL(%d)", InpPeriod));
+
+   IndicatorSetDouble(INDICATOR_LEVELVALUE, 0, InpLevelHigh);
+   IndicatorSetDouble(INDICATOR_LEVELVALUE, 1, InpLevelExtreme);
+
+   PlotIndexSetInteger(0, PLOT_LINE_COLOR, 0, InpColorNormal);
+   PlotIndexSetInteger(0, PLOT_LINE_COLOR, 1, InpColorHigh);
+   PlotIndexSetInteger(0, PLOT_LINE_COLOR, 2, InpColorExtreme);
+
+//--- Initialize the calculator engine
+   g_calculator = new CRVOLCalculator();
+   if(!g_calculator.Init(InpPeriod))
+     {
+      Print("Failed to initialize RVOL Calculator.");
+      return(INIT_FAILED);
+     }
+
+   return(INIT_SUCCEEDED);
+  }
+
+//+------------------------------------------------------------------+
+//| OnDeinit                                                         |
+//+------------------------------------------------------------------+
+void OnDeinit(const int reason)
+  {
+   if(CheckPointer(g_calculator) == POINTER_DYNAMIC)
+      delete g_calculator;
+  }
+
+//+------------------------------------------------------------------+
+//| OnCalculate                                                      |
+//+------------------------------------------------------------------+
+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[])
+  {
+// FIXED: Use an if/else block to pass the correct array reference
+   if(InpVolumeType == VOLUME_TICK)
+     {
+      // Delegate calculation to the engine using tick_volume
+      g_calculator.Calculate(rates_total, prev_calculated, tick_volume, ExtRvolBuffer);
+     }
+   else
+     {
+      // Delegate calculation to the engine using real volume
+      g_calculator.Calculate(rates_total, prev_calculated, volume, ExtRvolBuffer);
+     }
+
+//--- Set colors based on the calculated values
+   int limit = (prev_calculated == 0) ? InpPeriod : prev_calculated - 1;
+
+   for(int i = limit; i < rates_total; i++)
+     {
+      if(ExtRvolBuffer[i] >= InpLevelExtreme)
+        {
+         ExtColorBuffer[i] = 2; // Index for Extreme color
+        }
+      else
+         if(ExtRvolBuffer[i] >= InpLevelHigh)
+           {
+            ExtColorBuffer[i] = 1; // Index for High color
+           }
+         else
+           {
+            ExtColorBuffer[i] = 0; // Index for Normal color
+           }
+     }
+
+   return(rates_total);
+  }
+//+------------------------------------------------------------------+