I solved this with Seperators (http://doc.daypilot.org/scheduler/separators/)
dp.separators = [{color: "Green", width: 2, location: new DayPilot.Date()}];
dp.update();
setInterval(function () {
dp.separators.pop();
dp.separators = [
{color: "Green", layer: 'above', width: 2, location: new DayPilot.Date()}
];
dp.update();
}, 60*1000) // Update every minute