[Solved]-HighCharts - Negative $ currency values-Highcharts

You could just check if its a neggative value and return according to that:

           formatter: function () {
                if(this.value  >= 0 ){
                    return '$' + this.value / 1000;
                }else{
                    return '-$' + this.value / 1000*-1;
                }
            }