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2024-01-25 04:05:58 +03:30
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+///////////////////////////////////////////////////////
+// 
+// SaherElm IT Center MA Indicator
+// ---------------------------------------------
+// saherelm implementation of above indicator ...
+// this indicator uses two ma line:
+//  - fast ma;
+//  - slow ma;
+//
+// Maintainer:
+// ------------
+// Hadi Khazaee Asl (hadi_khazaee_asl@yahoo.com)
+// 
+//////////////////////////////////////////////////////
+//
+// Global Properties ...
+#property copyright "Copyright 2023, SaherElm IT Center"
+#property link "https://saherelm.ir"
+#property version "1.00"
+#property description "SaherElm MA Indicator"
+#property strict
+
+//
+// START Inputs ...
+//
+//
+// Fast MA ...
+input int maLength = 20; // MA Length
+input int maShift = 0; // MA Shift
+input ENUM_MA_METHOD maMethod = MODE_EMA; // MA Method
+input ENUM_APPLIED_PRICE maAppliedPrice = PRICE_CLOSE; // MA Applied Price
+
+//
+// START Global Definitions: Variables, Properties and etc ...
+//
+#property indicator_chart_window
+
+//
+#property indicator_buffers 1
+
+//
+#property indicator_plots 1
+
+//
+// Start Define Indicator Buffer Styles ...
+//
+//
+// Fast Ma Buffer ...
+#property indicator_label1  "Ma"
+#property indicator_type1   DRAW_LINE
+#property indicator_color1  clrYellow
+#property indicator_style1  STYLE_DOT
+#property indicator_width1  2
+
+//
+// End Define Indicator Buffer Styles ...
+//
+
+//
+// Buffers ...
+#define maBufferIndex 0
+
+double maBuffer[];
+//
+// END Global Definitions: Variables, Properties and etc ...
+//
+
+//
+// Start Event Handlers ...
+// 
+//
+// Initialization ...
+int OnInit() {
+    //
+    // Initialize what we want ...
+    if (maLength <= 0) {
+        return INIT_PARAMETERS_INCORRECT;    
+    }
+
+    //
+    // Start Set Index Buffers ...
+    //
+    //
+    // Ma ...
+    SetIndexBuffer(maBufferIndex, maBuffer);
+    SetIndexDrawBegin(maBufferIndex, maLength + 1);
+    //
+    // End Set Index Buffers ...
+    //
+
+    //
+    return INIT_SUCCEEDED;
+}
+
+//
+// Calculating what we want ...
+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[]
+) {
+    //
+    // this counts Available Bars ...
+    int limit;
+
+    //
+    // because in some cases we may have more than one input for 
+    // calculation and we must prevent any calculation
+    // untill we pass the biggest input length, here we get max Input length
+    // and then wait until pass it ...
+    int maxLength = MathMax(0, maLength);
+
+    //
+    // input variable, we return 0 means nothing passed ...
+    if (rates_total < maxLength) {
+      return 0;
+    }
+   
+    //
+    // found which candles calculated before ...
+    limit = (prev_calculated == 0) ? rates_total - maxLength - 1 : rates_total - prev_calculated + 1;
+
+    //
+    // this is the main loop of calculations, for each bar index ...
+    for (int i = limit - 1; i >= 0; i--) {
+        //
+        // Start Calculation here ...
+        // i is bar_index ... 
+        
+        //
+        // Calculate Ma ...
+        CalculateMa(i);
+    }
+
+    //
+    return rates_total;
+}
+//
+// END Event Handlers ...
+// 
+
+//
+// START Functions ...
+//
+//
+// Calculating Ma ...
+void CalculateMa(
+    const int &bar_index
+) {
+    //
+    // Calculating Fast Ma ...
+    double ma = iMA(
+        _Symbol,
+        _Period,
+        maLength,
+        maShift,
+        maMethod,
+        maAppliedPrice,
+        bar_index
+    );
+    
+    //
+    maBuffer[bar_index] = ma;
+}
+//
+// END Functions ...
+//