diff --git a/Src/AST/Myc.Ast.Evaluator.pas b/Src/AST/Myc.Ast.Evaluator.pas
index 88b0124..111a1ce 100644
--- a/Src/AST/Myc.Ast.Evaluator.pas
+++ b/Src/AST/Myc.Ast.Evaluator.pas
@@ -201,23 +201,32 @@ end;
 function TEvaluatorVisitor.VisitFunctionCall(const Node: IFunctionCallNode): TDataValue;
 var
     calleeValue: TDataValue;
-    argValues: TArray<TDataValue>;
-    i: Integer;
 begin
     calleeValue := Node.Callee.Accept(Self);
 
-    var argNodes := Node.Arguments;
-    SetLength(argValues, Length(argNodes));
-    for i := 0 to High(argNodes) do
-        argValues[i] := argNodes[i].Accept(Self);
-
-    if (calleeValue.Kind = vkMethod) then
-        Result := (calleeValue.AsMethod)(argValues)
-    else
+    if calleeValue.Kind <> vkMethod then
         raise EArgumentException.Create('Expression is not invokable in this context.');
+
+    var argNodes := Node.Arguments;
+    case Length(argNodes) of
+        0: Result := (calleeValue.AsMethod)([]);
+        1: Result := (calleeValue.AsMethod)([argNodes[0].Accept(Self)]);
+        2: Result := (calleeValue.AsMethod)([argNodes[0].Accept(Self), argNodes[1].Accept(Self)]);
+        3: Result := (calleeValue.AsMethod)([argNodes[0].Accept(Self), argNodes[1].Accept(Self), argNodes[2].Accept(Self)]);
+        4:
+            Result :=
+                (calleeValue.AsMethod)
+                    ([argNodes[0].Accept(Self), argNodes[1].Accept(Self), argNodes[2].Accept(Self), argNodes[3].Accept(Self)]);
+    else
+        var argValues: TArray<TDataValue>;
+        SetLength(argValues, Length(argNodes));
+        for var i := 0 to High(argNodes) do
+            argValues[i] := argNodes[i].Accept(Self);
+
+        Result := (calleeValue.AsMethod)(argValues);
+    end;
 end;
 
-// ... The rest of the Visit... methods are unchanged and remain as they were ...
 function TEvaluatorVisitor.VisitAddSeriesItem(const Node: IAddSeriesItemNode): TDataValue;
 var
     itemValue, lookbackValue, seriesVar: TDataValue;