All in all, you are looking at an order of operations issue. Add the data and types to the Chart FIRST, and then add your title, and it should all work out just fine

Make sure to use the Excel Constants WITHOUT quotes. They are constants, after all.

use strict;
use Win32::OLE;
use Win32::OLE::Const 'Microsoft Excel';
use Win32::OLE qw(in with);
use Win32::OLE::Variant;
use Win32::OLE::NLS qw(:LOCALE :DATE);

$Win32::OLE::Warn = 3; # Die on Errors.

my $vttrue =  Variant(VT_BOOL, 1);
my $vtfalse =  Variant(VT_BOOL, 0);

my $Excel = Win32::OLE->GetActiveObject('Excel.Application')
        || Win32::OLE->new('Excel.Application', 'Quit'); 
   $Excel->{DisplayAlerts}=0;   

$Excel->{Visible} = 1;

my $Book = $Excel->Workbooks->Add;
my $Sheet = $Book->Worksheets(1);

my $Range = $Sheet->Range("A2:C7");
$Range->{Value} =
    [['TIME', 'QUANTITY', 'PRICE'],
     ['10:00', 100, 15],
     ['11:00', 150, 10],
     ['12:00', 80, 10],
     ['13:00', 100, 20],
     ['14:00', 120, 15]];
     
my $Chart = $Excel->Charts->Add or die;
   $Chart->{ChartType} =xlLine ;

   my $series = 1;   
   foreach my $col ("A".."C"){
       $Chart->SeriesCollection->Add($Sheet->Range($col."2:".$col."7")
+);
 
$Chart->SeriesCollection($series)->{Name}=$Sheet->Range($col."2")->{Va
+lue};
       $series++;
   }
   
   $Chart->{HasTitle} = $vttrue;
   $Chart->ChartTitle->{Text} = "My Chart Title";
[download]

C-.

---
Flex the Geek