Revisá este código, te ayudará:
Código Delphi
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procedure TForm1.Button4Click(Sender: TObject);
var
Barra: TBarSeries;
BarValues: Array of Double;
begin
Barra := Chart1.Series[0] as TBarSeries;
Barra.DataSource := nil;
Barra.AddArray([1, 1.2, 3]);
Barra.Visible := True;
SetLength(BarValues, 3);
BarValues[0] := 10;
BarValues[1] := 8;
BarValues[2] := 3;
Barra.AddArray(BarValues);
Barra.YValue[0] := 10;
Barra.YValue[0] := 12;
end;
Hasta luego.