How Do I Dynamically Update The Range Inside A Gauge (highcharts)?

Question1 I want to change the range inside the gauge, ie currently it is hardcoded as 0-200. But what if my value goes above 200, something like 300, then it should automatically

Solution 1:

Question 1: Min/max values needs to be number, not percent value. In case when you would like to modify range, dynamically, you can use update function, called on axis.

See example: http://jsfiddle.net/jgRTz/http://api.highcharts.com/highcharts#Axis.update()

Question 2: In understand that you woudl liek to set limit (adding point not shift chart), but after do it like here:

http://jsfiddle.net/qzZxh/

setInterval(function() {
                        var x = (newDate()).getTime(), // current time
                            y = Math.random();

                        if(series.data.length > MAXPOINTS)
                            series.addPoint([x, y], true, true);
                        else
                            series.addPoint([x, y], true, false);

                    }, 1000);