apply fix issues on reading and calculating swings and ... on XCA indicators ...

Indicators/x-saherelm.x121.xca.mq5

@@ -128,11 +128,11 @@ input bool showLongCycle = true;            // Show Long Cycle
 input bool showHindCycle = true;            // Show Hind Cycle
 
 //
-input int sarArrowCode = 159;       // Parabolic Sar Arrow Code
-input int peakArrowCode = 159;      // Peaks Arrow Code
-input int valeArrowCode = 159;      // Vales Arrow Code
-input int swingLowArrowCode = 225;  // Swing Low Arrow Code
-input int swingHighArrowCode = 226; // Swing High Arrow Code
+int sarArrowCode = 159;       // Parabolic Sar Arrow Code
+int peakArrowCode = 159;      // Peaks Arrow Code
+int valeArrowCode = 159;      // Vales Arrow Code
+int swingLowArrowCode = 225;  // Swing Low Arrow Code
+int swingHighArrowCode = 226; // Swing High Arrow Code
 
 //
 // Buffers ...
@@ -1626,6 +1626,11 @@ void CalculateBuffers(
         barsLimit = ratesTotal;
         firstBarIndex = barsLimit - 1;
     }
+    else
+    {
+        //
+        firstBarIndex = startCalculationForLastBars;
+    }
 
     //
     // bool canCalculate = true;