Line chart

The line chart is represented by a series of datapoints connected with a straight line. Line charts are most often used to visualize data that changes over time.

Line chart features

The line chart inherit the options a series  has plus some more. See the API reference  for a full list of the line chart plotOptions.

Most options set in plotOptions can also be set on a individual series.

Step

Allows the use of steps instead of a straight line.

Try it here 

Code to enable step:

plotOptions: {
    series: {
        step: 'left' // or 'center' or 'right'
    }
}