AmoN,
You are passing values instead of y within $dataPoints. Replacing $dataPoints[0] = array("value" => $row["values"], "label"=> $row["date(timestamp)"]) with $dataPoints[0] = array("y" => $row["values"], "label"=> $row["date(timestamp)"]) should work fine in this case.
—-
Manoj Mohan
Team CanvasJS