Create a soccer standings chart

Hello, I need to create a standings to show the position of soccer teams by each game.

Now I have a chart with the position on each day:

 $chart = array(
      '#chart_id' => 'classificacio',
      '#type' => CHART_TYPE_LINE,
      '#size' => chart_size(430, 250),
      '#adjust_resolution' => TRUE,
    );
 for ($i = 1; $i <= $jornadaactual; $i++){
 	$chart['#data']['fruits'][] = polnetworkmodule_classificacio_equip_jornada($grup,$temporada_actual,$i,$nid,$grup);
 	$chart['#labels'][] = $i;//' '.polnetworkmodule_classificacio_equip_jornada($grup,$temporada_actual,$i,$nid,$grup).'pt.';
 	$chart['#mixed_axis_labels'][CHART_AXIS_X_BOTTOM][1][] = 'text';
 	$chart['#mixed_axis_labels'][CHART_AXIS_X_BOTTOM][2][] = chart_mixed_axis_label(polnetworkmodule_classificacio_equip_jornada($grup,$temporada_actual,$i,$nid,$grup). ' pos.', 0);
 }
  echo chart_render($chart);

What I need is to show lower values (it's a position 1st should be the top) and to display the position value inside the chart.
Any idea of how to do that?

Thank's for all your work!