fixed warnings

ChartDisplay/ChartDisplayMain.pas

@@ -259,6 +259,24 @@ var
     BuilderNCaptionKey, BuilderVCaptionKey: string; // These will be the unique keys
     BuilderNDescription, BuilderVDescription: string;
 begin
+    IsMemoryLow :=
+        function: Boolean
+        var
+            memStatusEx: TMemoryStatusEx;
+        begin
+            memStatusEx.dwLength := SizeOf(TMemoryStatusEx); // Initialize the structure size
+            if GlobalMemoryStatusEx(memStatusEx) then
+            begin
+                Result := memStatusEx.dwMemoryLoad >= 80;
+            end
+            else
+            begin
+                // Handle potential error if GlobalMemoryStatusEx fails
+                RaiseLastOSError;
+                Result := False; // Or handle error as appropriate
+            end;
+        end;
+
     FCandleWidthInPixels := InitialCandleWidth;
     FCandleSpacing := InitialCandleSpacing;
     FDisplayStartIndex := 0;
@@ -447,7 +465,6 @@ var
     NewOptimalStartIndex, i: Integer;
 begin
     Memo.Lines.Add(FormatDateTime('yyyy-mm-dd hh:nn:ss', Now) + ' - Refresh Button clicked...');
-    TargetStartTickIndex := -1;
 
     if Assigned(FActiveOHLCCache)
         and FActiveOHLCCache.IsValid
@@ -566,10 +583,6 @@ end;
 procedure TChartForm.PathSelectButtonClick(Sender: TObject);
 var
     selectedDirectory: string;
-    fileName: string;
-    pathValue, symbolValue: string;
-    yearValue, monthValue: Integer;
-    i: Integer;
 begin
     selectedDirectory := DataPathEdit.Text; // Start with current path, if any
     // Use Vcl.FileCtrl.SelectDirectory function for directory selection.
@@ -1458,7 +1471,6 @@ end;
 
 procedure TChartForm.PopulateSymbolComboBox;
 var
-    selectedDirectory: string;
     fileName: string;
     pathValue, symbolValue: string;
     yearValue, monthValue: Integer;