Obviously, more info is always helpful in dissecting code, but here are a few general comments:

• As evidenced by the call &$action($$trdstmt->fetchrow_hashref());, $action is a code ref, though I'd need to see more code to determine is it is an anonymous sub. I'd also have to see more code to know what it does.
• Based on the structure, I'm guessing that $trade in the while-loop contains your database return. A simple way to examine its contents should be to use Data::Dumper, a la:

      while(my $trade = $trdstmt->fetchrow_hashref()) {
          print Dumper $trade;
          &$action(%$trade);
          $count++;
      }
  [download]

  after adding use Data::Dumper; to your code.
• I am guessing based on syntax that $self is a DBI database handle. Assuming this is the case, I would suggest instrumenting to test for success on your database calls. Perhaps something like:

      $trdstmt->bind_param(1,$self->{'startdate'}) or die "Bind failed: 
  +$DBI::errstr";
      $trdstmt->bind_param(2,$self->{'enddate'}) or die "Bind failed: $D
  +BI::errstr";
      $trdstmt->execute() or die "Execute: $DBI::errstr";
  [download]

• For a reasonable review of Perl approaches to tackle this task, read Basic debugging checklist.

Update: Note the bug caught by bluescreen below.

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