highcharts tooltip format millions billions

Question

I want to display couple of points on a highcharts line chart which are big numbers.

e.g. 100,000, 10,000,000, 1,000,000,000

When I display these, the y axi

Answer 1

Piggybacking off @Pawel Fus, a slight tweak allows you to have negative currency values as well but with the negative outside the $ (i.e. -$100K versus -$-100k).

function () {
    var isNegative = this.value < 0 ? '-' : '';
    var absValue = Math.abs(this.value);
    return isNegative + '$' + this.axis.defaultLabelFormatter.call({
        axis: this.axis,
        value: absValue
    });
}

Here is a jsFiddle: http://jsfiddle.net/4yuo9mww/1/