use Spreadsheet::ParseExcel;
use Spreadsheet::ParseExcel::SaveParser;
use Spreadsheet::WriteExcel;

# Open an existing file with SaveParser
my $parser      = Spreadsheet::ParseExcel::SaveParser->new();
my $template    = $parser->Parse('MyExcel.xls');
my $worksheet   = $template->worksheet('Firstsheet');
my $chart       = $template->add_chart( type => 'line' );
$chart->add_series(
   categories => '=URV!$A$17:$A$442',
   values     => '=URV!$D$17:$D$442',
   name       => 'pended graph',
);