diff --git a/components/tachart/demo/html/main.lfm b/components/tachart/demo/html/main.lfm
index 11b7fc30a5..b8c09a44bb 100644
--- a/components/tachart/demo/html/main.lfm
+++ b/components/tachart/demo/html/main.lfm
@@ -1,17 +1,17 @@
 object MainForm: TMainForm
   Left = 280
-  Height = 432
+  Height = 452
   Top = 130
   Width = 655
   Caption = 'HTML demo'
-  ClientHeight = 432
+  ClientHeight = 452
   ClientWidth = 655
   OnCreate = FormCreate
   LCLVersion = '1.9.0.0'
   object BottomPanel: TPanel
     Left = 8
     Height = 91
-    Top = 333
+    Top = 353
     Width = 647
     Align = alBottom
     AutoSize = True
@@ -26,11 +26,11 @@ object MainForm: TMainForm
       Left = 0
       Height = 78
       Top = 8
-      Width = 221
+      Width = 327
       AutoFill = True
       AutoSize = True
       BorderSpacing.InnerBorder = 4
-      Caption = 'HTML'
+      Caption = 'Show HTML codes'
       ChildSizing.LeftRightSpacing = 6
       ChildSizing.TopBottomSpacing = 6
       ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
@@ -38,21 +38,23 @@ object MainForm: TMainForm
       ChildSizing.ShrinkHorizontal = crsScaleChilds
       ChildSizing.ShrinkVertical = crsScaleChilds
       ChildSizing.Layout = cclLeftToRightThenTopToBottom
-      ChildSizing.ControlsPerLine = 3
+      ChildSizing.ControlsPerLine = 4
       ClientHeight = 58
-      ClientWidth = 217
-      Columns = 3
+      ClientWidth = 323
+      Columns = 4
       Items.Strings = (
         'title'
         'footer'
         'legend'
+        'series labels'
+        'x axis labels'
         'x axis title'
         'y axis title'
       )
       OnItemClick = CgHTMLItemClick
       TabOrder = 0
       Data = {
-        050000000202020202
+        0700000002020202020202
       }
     end
     object BtnCopyToClipboard: TButton
@@ -108,7 +110,7 @@ object MainForm: TMainForm
   end
   object Chart: TChart
     Left = 8
-    Height = 317
+    Height = 337
     Top = 8
     Width = 639
     AxisList = <    
@@ -119,7 +121,7 @@ object MainForm: TMainForm
         Title.LabelFont.Height = -16
         Title.LabelFont.Orientation = 900
         Title.Visible = True
-        Title.Caption = 'Area, cm<sup>2</cm>'
+        Title.Caption = 'Area A, cm<sup>2</cm>'
         Title.TextFormat = tfHTML
       end    
       item
@@ -127,20 +129,22 @@ object MainForm: TMainForm
         Grid.Style = psSolid
         Grid.Visible = False
         Alignment = calBottom
+        Marks.TextFormat = tfHTML
         Minors = <>
         Title.LabelFont.Height = -16
         Title.Visible = True
-        Title.Caption = 'Angle &alpha;'
+        Title.Caption = 'Angle &alpha;, &deg;'
         Title.TextFormat = tfHTML
+        OnMarkToText = ChartAxisList1MarkToText
       end>
     BackColor = clWhite
     Foot.Alignment = taLeftJustify
     Foot.Brush.Color = clBtnFace
     Foot.Brush.Style = bsClear
-    Foot.Font.Color = clBlue
+    Foot.Font.Color = clGray
     Foot.Text.Strings = (
       '<u>Reference</u>:'
-      'W. Shakespeare, <i>"J. Irreproducible Results"</i>, <b>38</b>, 512 (2017)'
+      'W. Shakespeare, <i>"J. Irreprod. Res."</i>, <b>38</b>, 512 (2017)'
     )
     Foot.TextFormat = tfHTML
     Foot.Visible = True
@@ -148,7 +152,7 @@ object MainForm: TMainForm
     Legend.Visible = True
     Title.Brush.Color = clBtnFace
     Title.Brush.Style = bsClear
-    Title.Font.Color = clBlue
+    Title.Font.Color = clNavy
     Title.Font.Height = -19
     Title.Font.Style = [fsBold]
     Title.Text.Strings = (
@@ -159,35 +163,35 @@ object MainForm: TMainForm
     Align = alClient
     BorderSpacing.Around = 8
     Color = clWhite
-    object RedSeries: TLineSeries
-      Title = '<font color="red">Red</font> series'
+    object DataSeries: TLineSeries
+      Marks.Format = '%2:s'
+      Marks.Frame.Color = clGray
+      Marks.LinkPen.Color = clGray
+      Marks.Style = smsLabel
+      Marks.TextFormat = tfHTML
+      Title = '<font color="red">Measured</font>'
       LinePen.Color = clRed
-      Source = RedSource
+      LineType = ltNone
+      Pointer.Brush.Color = clRed
+      Pointer.Style = psCircle
+      ShowPoints = True
     end
-    object BlueSeries: TLineSeries
-      Title = '<font color="blue">Blue</font> series'
-      LinePen.Color = clBlue
-      Source = BlueSource
+    object FitSeries: TFitSeries
+      Marks.Alignment = taCenter
+      Marks.TextFormat = tfHTML
+      Title = 'Fit curve (<font color="blue">blue</font>)'
+      Pen.Color = clBlue
+      Pointer.Visible = False
+      Source = ListChartSource
+      OnFitComplete = FitSeriesFitComplete
     end
   end
-  object RedSource: TRandomChartSource
-    PointsNumber = 20
-    RandSeed = 1926906778
-    XMax = 90
-    XMin = 0
-    YMax = 10
-    YMin = 4
-    left = 121
-    top = 52
+  object ListChartSource: TListChartSource
+    left = 224
+    top = 88
   end
-  object BlueSource: TRandomChartSource
-    PointsNumber = 30
-    RandSeed = 1926958054
-    XMax = 90
-    XMin = 0
-    YMax = 8
-    YMin = 0
-    left = 120
-    top = 111
+  object ListChartSource_Fit: TListChartSource
+    left = 224
+    top = 153
   end
 end
diff --git a/components/tachart/demo/html/main.pas b/components/tachart/demo/html/main.pas
index 956321a2f2..bd6ae8a54a 100644
--- a/components/tachart/demo/html/main.pas
+++ b/components/tachart/demo/html/main.pas
@@ -6,7 +6,7 @@ interface
 
 uses
   Classes, SysUtils, FileUtil, TAGraph, TASeries, TASources, Forms, Controls,
-  Graphics, Dialogs, ExtCtrls, StdCtrls;
+  Graphics, Dialogs, ExtCtrls, StdCtrls, TAChartAxisUtils, TAFuncSeries;
 
 type
 
@@ -18,17 +18,21 @@ type
     BtnSaveSVG: TButton;
     Chart: TChart;
     CgHTML: TCheckGroup;
-    RedSource: TRandomChartSource;
-    BlueSource: TRandomChartSource;
-    RedSeries: TLineSeries;
-    BlueSeries: TLineSeries;
+    FitSeries: TFitSeries;
+    ListChartSource: TListChartSource;
+    DataSeries: TLineSeries;
     BottomPanel: TPanel;
+    ListChartSource_Fit: TListChartSource;
     procedure BtnCopyToClipboardClick(Sender: TObject);
     procedure BtnSaveWMFClick(Sender: TObject);
     procedure BtnSaveSVGClick(Sender: TObject);
     procedure CgHTMLItemClick(Sender: TObject; Index: integer);
+    procedure ChartAxisList1MarkToText(var AText: String; AMark: Double);
+    procedure FitSeriesFitComplete(Sender: TObject);
     procedure FormCreate(Sender: TObject);
+
   private
+    procedure CreateData;
 
   public
 
@@ -42,7 +46,7 @@ implementation
 {$R *.lfm}
 
 uses
-  TAChartUtils, {$IFDEF WINDOWS}TADrawerWMF,{$ENDIF} TADrawerSVG;
+  Math, TAChartUtils, {$IFDEF WINDOWS}TADrawerWMF,{$ENDIF} TADrawerSVG;
 
 { TMainForm }
 
@@ -70,26 +74,86 @@ procedure TMainForm.CgHTMLItemClick(Sender: TObject; Index: integer);
 var
   tf: TChartTextFormat;
 begin
-  if CgHTML.Checked[Index] then tf := tfHTML else tf := tfNormal;
+  if CgHTML.Checked[Index] then tf := tfNormal else tf := tfHTML;
   case Index of
     0: Chart.Title.TextFormat := tf;
     1: Chart.Foot.TextFormat := tf;
     2: Chart.Legend.TextFormat := tf;
-    3: Chart.BottomAxis.Title.TextFormat := tf;
-    4: Chart.LeftAxis.Title.TextFormat := tf;
+    3: DataSeries.Marks.TextFormat := tf;
+    4: Chart.BottomAxis.Marks.TextFormat := tf;
+    5: Chart.BottomAxis.Title.TextFormat := tf;
+    6: Chart.LeftAxis.Title.TextFormat := tf;
   end;
 end;
 
+procedure TMainForm.ChartAxisList1MarkToText(var AText: String; AMark: Double);
+begin
+  AText := AText + '&deg;';
+end;
+
+procedure TMainForm.CreateData;
+const
+  N = 20;
+  MIN = 0;
+  MAX = 90;
+  OUTLIER_INDEX = 12;
+var
+  i: Integer;
+  x, y: Double;
+  s: String;
+begin
+  for i:=0 to N-1 do begin
+    x := MIN + (MAX - MIN) * i / (N-1) + 5*(random - 0.5);
+    if i = OUTLIER_INDEX then begin
+      y := 631;
+      s := 'Defective device!' + LineEnding + '(&alpha; = ' + FormatFloat('0.00', x) + '&deg;)';
+    end else
+    begin
+      y := x*x / 10 + (random - 0.5) * 100;
+      s := '';
+    end;
+    ListChartSource.Add(x, y, s);
+    if i <> OUTLIER_INDEX then
+      ListChartSource_Fit.Add(x, y);
+  end;
+  DataSeries.Source := ListChartSource;
+  FitSeries.Source := ListChartSource_Fit;
+end;
+
+procedure TMainForm.FitSeriesFitComplete(Sender: TObject);
+var
+  p: Array of Double;
+  i: Integer;
+  s: String;
+begin
+  SetLength(p, FitSeries.ParamCount);
+  for i:=0 to FitSeries.ParamCount-1 do
+    p[i] := FitSeries.Param[i];
+
+  s := FitSeries.EquationText.
+    x('&alpha;').
+    y('A').
+    NumFormat('%.2f').
+    DecimalSeparator('.').
+    Params(p).
+    Get;
+  FitSeries.Title := '<font color="blue">Fitted:</font> ' + s;
+end;
+
 procedure TMainForm.FormCreate(Sender: TObject);
 begin
-  CgHTML.Checked[0] := Chart.Title.TextFormat = tfHTML;
-  CgHTML.Checked[1] := Chart.Foot.TextFormat = tfHTML;
-  CgHTML.Checked[2] := Chart.Legend.TextFormat = tfHTML;
-  CgHTML.Checked[3] := Chart.BottomAxis.Title.TextFormat = tfHTML;
-  CgHTML.Checked[4] := Chart.LeftAxis.Title.TextFormat = tfHTML;
+  CreateData;
+
+  CgHTML.Checked[0] := Chart.Title.TextFormat = tfNormal;
+  CgHTML.Checked[1] := Chart.Foot.TextFormat = tfNormal;
+  CgHTML.Checked[2] := Chart.Legend.TextFormat = tfNormal;
+  CgHTML.Checked[3] := DataSeries.Marks.TextFormat = tfNormal;
+  CgHTML.Checked[4] := Chart.BottomAxis.Marks.TextFormat = tfNormal;
+  CgHTML.Checked[5] := Chart.BottomAxis.Title.TextFormat = tfNormal;
+  CgHTML.Checked[6] := Chart.LeftAxis.Title.TextFormat = tfNormal;
 
   {$IFDEF WINDOWS}
-  Chart.Foot.Text[1] := '<font name="Times New Roman" color="blue">' + Chart.Foot.Text[1] + '</font>';
+  Chart.Foot.Text[1] := '<font name="Times New Roman" color="gray">' + Chart.Foot.Text[1] + '</font>';
   {$ELSE}
   BtnSaveWMF.Hide;
   {$ENDIF}
diff --git a/components/tachart/tafitutils.pas b/components/tachart/tafitutils.pas
index 12cb029733..b5c320b14e 100644
--- a/components/tachart/tafitutils.pas
+++ b/components/tachart/tafitutils.pas
@@ -14,6 +14,9 @@ unit TAFitUtils;
 
 interface
 
+uses
+  TAChartUtils;
+
 type
   TFitEquation = (
     fePolynomial, // y = b0 + b1*x + b2*x^2 + ... bn*x^n
@@ -23,43 +26,51 @@ type
   );
 
   IFitEquationText = interface
+    function DecimalSeparator(AValue: Char): IFitEquationText;
     function Equation(AEquation: TFitEquation): IFitEquationText;
     function X(AText: String): IFitEquationText;
     function Y(AText: String): IFitEquationText;
     function NumFormat(AFormat: String): IFitEquationText;
     function NumFormats(const AFormats: array of String): IFitEquationText;
     function Params(const AParams: array of Double): IFitEquationText;
+    function TextFormat(AFormat: TChartTextFormat): IFitEquationText;
     function Get: String;
   end;
 
   TFitEmptyEquationText = class(TInterfacedObject, IFitEquationText)
   public
+    function DecimalSeparator(AValue: Char): IFitEquationText;
     function Equation(AEquation: TFitEquation): IFitEquationText;
     function X(AText: String): IFitEquationText;
     function Y(AText: String): IFitEquationText;
     function NumFormat(AFormat: String): IFitEquationText;
     function NumFormats(const AFormats: array of String): IFitEquationText;
     function Params(const AParams: array of Double): IFitEquationText;
+    function TextFormat(AFormat: TChartTextFormat): IFitEquationText;
     function Get: String;
   end;
 
   TFitEquationText = class(TInterfacedObject, IFitEquationText)
   strict private
+    FDecSep: Char;
     FEquation: TFitEquation;
     FX: String;
     FY: String;
     FNumFormat: String;
     FNumFormats: array of String;
     FParams: array of Double;
+    FTextFormat: TChartTextFormat;
     function GetNumFormat(AIndex: Integer): String;
   public
     constructor Create;
+    function DecimalSeparator(AValue: Char): IFitEquationText;
     function Equation(AEquation: TFitEquation): IFitEquationText;
     function X(AText: String): IFitEquationText;
     function Y(AText: String): IFitEquationText;
     function NumFormat(AFormat: String): IFitEquationText;
     function NumFormats(const AFormats: array of String): IFitEquationText;
     function Params(const AParams: array of Double): IFitEquationText;
+    function TextFormat(AFormat: TChartTextFormat): IFitEquationText;
     function Get: String;
   end;
 
@@ -68,15 +79,22 @@ type
 implementation
 
 uses
-  TAChartUtils, StrUtils, SysUtils;
+  StrUtils, SysUtils;
 
 operator := (AEq: IFitEquationText): String;
 begin
   Result := AEq.Get;
 end;
 
+
 { TFitEmptyEquationText }
 
+function TFitEmptyEquationText.DecimalSeparator(AValue: Char): IFitEquationText;
+begin
+  Unused(AValue);
+  Result := Self;
+end;
+
 function TFitEmptyEquationText.Equation(
   AEquation: TFitEquation): IFitEquationText;
 begin
@@ -109,6 +127,12 @@ begin
   Result := Self;
 end;
 
+function TFitEmptyEquationText.TextFormat(AFormat: TChartTextFormat): IFitEquationText;
+begin
+  Unused(AFormat);
+  Result := Self;
+end;
+
 function TFitEmptyEquationText.X(AText: String): IFitEquationText;
 begin
   Unused(AText);
@@ -128,6 +152,13 @@ begin
   FX := 'x';
   FY := 'y';
   FNumFormat := '%.9g';
+  FDecSep := DefaultFormatSettings.DecimalSeparator;
+end;
+
+function TFitEquationText.DecimalSeparator(AValue: Char): IFitEquationText;
+begin
+  FDecSep := AValue;
+  Result := self;
 end;
 
 function TFitEquationText.Equation(AEquation: TFitEquation): IFitEquationText;
@@ -139,24 +170,54 @@ end;
 function TFitEquationText.Get: String;
 var
   ps: String = '';
+  s: String;
   i: Integer;
+  fs: TFormatSettings;
 begin
-  if Length(FParams) = 0 then exit('');
-  Result := Format('%s = ' + GetNumFormat(0), [FY, FParams[0]]);
+  if Length(FParams) = 0 then
+    exit('');
+
+  fs := DefaultFormatSettings;
+  fs.DecimalSeparator := FDecSep;
+
+  Result := Format('%s = ' + GetNumFormat(0), [FY, FParams[0]], fs);
   if FEquation in [fePolynomial, feLinear] then
     for i := 1 to High(FParams) do begin
-      if FParams[i] = 0 then continue;
-      if i > 1 then ps := Format('^%d', [i]);
-      Result += Format(
-        ' %s ' + GetNumFormat(i) + '*%s%s',
-        [IfThen(FParams[i] > 0, '+', '-'), Abs(FParams[i]), FX, ps]);
+      if FParams[i] = 0 then
+        continue;
+      if FTextFormat = tfNormal then
+      begin
+        if i > 1 then ps := Format('^%d', [i]);
+        s := '*%s%s';
+      end else
+      begin
+        if i > 1 then ps := Format('<sup>%d</sup>', [i]);
+        s := '&middot;%s%s';
+      end;
+      Result += Format(' %s ' + GetNumFormat(i) + s,
+        [IfThen(FParams[i] > 0, '+', '-'), Abs(FParams[i]), FX, ps], fs
+      );
     end
   else if (Length(FParams) >= 2) and (FParams[0] <> 0) and (FParams[1] <> 0) then
     case FEquation of
       feExp:
-        Result += Format(' * exp(' + GetNumFormat(1) +' * %s)', [FParams[1], FX]);
+        if FTextFormat = tfNormal then
+          Result += Format(' * exp(' + GetNumFormat(1) +' * %s)',
+            [FParams[1], FX], fs
+          )
+        else
+          Result += Format(' &middot; e<sup>' + GetNumFormat(1) + '&middot; %s</sup>',
+            [FParams[1], FX], fs
+          );
       fePower:
-        Result += Format(' * %s^' + GetNumFormat(1), [FX, FParams[1]]);
+        if FTextFormat = tfNormal then
+          Result += Format(' * %s^' + GetNumFormat(1),
+            [FX, FParams[1]], fs
+          )
+        else
+          Result += Format(' &middot; %s<sup>' + GetNumFormat(1) + '</sup>',
+            [FX, FParams[1]], fs
+          );
     end;
 end;
 
@@ -196,6 +257,12 @@ begin
   Result := Self;
 end;
 
+function TFitEquationText.TextFormat(AFormat: TChartTextFormat): IFitEquationText;
+begin
+  FTextFormat := AFormat;
+  Result := Self;
+end;
+
 function TFitEquationText.X(AText: String): IFitEquationText;
 begin
   FX := AText;
diff --git a/components/tachart/tafuncseries.pas b/components/tachart/tafuncseries.pas
index 6b2a510261..079e14e65f 100644
--- a/components/tachart/tafuncseries.pas
+++ b/components/tachart/tafuncseries.pas
@@ -1489,7 +1489,7 @@ begin
     Result := TFitEquationText.Create
   else
     Result := TFitEmptyEquationText.Create;
-  Result.Equation(FitEquation).Params(FFitParams);
+  Result.TextFormat(Marks.TextFormat).Equation(FitEquation).Params(FFitParams);
 end;
 
 procedure TFitSeries.ExecFit;