$chart = new Highchart(Highchart::HIGHSTOCK);

$chart->chart->renderTo = "container";
$chart->rangeSelector->selected = 1;
$chart->title->text = "AAPL Stock Price";

$chart->series[] = array(
    'name' => "AAPL Stock Price",
    'data' => new HighchartJsExpr("data"),
    'step' => 1,
    'tooltip' => array(
        'valueDecimals' => 2
    )
);