• NAME
• SYNOPSIS
• EMA/SMA Note
• AUTHOR
• Thanks
• Special Thanks
• SEE ALSO
• Go Read this Page:

NAME

Math::Business::MACD - Perl extension for calculating MACDs

SYNOPSIS

  use Math::Business::MACD;

  my $macd = new Math::Business::MACD;

  my ($slow, $fast, $trigger) = (26, 12, 9);

  set_days $macd $slow, $fast, $trigger;

  my @closing_values = qw(
      3 4 4 5 6 5 6 5 5 5 5
      6 6 6 6 7 7 7 8 8 8 8
  );

  foreach(@closing_values) {
      $macd->insert( $_ );
      print "       MACD: ", $macd->query,          "\n",
            "Trigger EMA: ", $macd->query_trig_ema, "\n",
            "   Fast EMA: ", $macd->query_fast_ema, "\n",
            "   Slow EMA: ", $macd->query_slow_ema, "\n";
  }

  # to avoid recalculating huge lists when 
  # you add a few new values on the end

  $ema->start_with( 
      $last_slow_ema,
      $last_fast_ema,
      $last_trig_ema,
  );

  # then continue with a foreach over the newly
  # inserted values

  # unfortunately this means you'd have had to
  # store the last slow, fast, and trigger ema's.
  # somewhere

EMA/SMA Note

    As of SMA 0.99, EMA 1.06, MACD 1.10, the MACD will now return 
    'undef' where there is not yet enough data to calculate the EMAs.
    Further, the trigger and histogram values will not be available until
    the trigger EMA has enough data.

    This is going to be a compat buster for some of my graphs, but it has
    to be done for correctness.  :(

AUTHOR

Jettero Heller <jettero@cpan.org>

http://www.voltar.org

Thanks

David Perry <David.Perry@ca.com>

Special Thanks

http://www.stockcharts.com/education/What/IndicatorAnalysis/indic_MACD1.html

SEE ALSO

perl(1), Math::Business::EMA(3).

Go Read this Page:

http://www.stockcharts.com/education/What/IndicatorAnalysis/indic_MACD1.html