diff --git a/components/tachart/tamultiseries.pas b/components/tachart/tamultiseries.pas
index d08ca79fed..db5ce16e8e 100644
--- a/components/tachart/tamultiseries.pas
+++ b/components/tachart/tamultiseries.pas
@@ -1066,6 +1066,9 @@ var
 
 begin
   Result := Source.ExtentList;
+  if Source.Count = 0 then
+    exit;
+  
   // Show first and last boxes fully.
   j := -1;
   x := NaN;