A Highcharts volcano plot made accessible by the MAIDR Highcharts adapter.
Highcharts ships no volcano series — the chart is an ordinary scatter with
the cutoffs drawn as plot lines — so nothing in the chart object says what
it is, and the reading is declared with
significancePlot: { type: 'volcano' }. MAIDR then reads the
cloud through the threshold: it opens with how many genes clear it, names
them, and announces each point's gene rather than its two coordinates.
Click on the chart and use the arrow keys.