function get_trend_pulses()
{
session_write_close();
$params = array('range' => 7);
$graph = array();
$otx = new Otx();
$trend = $otx->get_events_from_all_pulses($params);
if (is_array($trend) && count($trend) > 0) {
$legend = build_legend(7);
foreach ($legend as $l) {
$graph[] = array('date' => $l, 'value' => intval($trend[$l]['value']));
}
}
return $graph;
}