title: How to keep x-axis max value not changed in Highcharts?
body: <p>series.addPoint (Object options, [Boolean redraw], [Boolean shift], [Mixed animation])</p>
  
  <pre><code>      chart: {
                  events: {
                      load: function() {
  
                          // set up the updating of the chart each second
                          var series = this.series[0];
                          setInterval(function() {
                              var x = (new Date()).getTime(), // current time
                                  y = Math.round(Math.random() * 100);
                              series.addPoint([x, y], true, false, true);
                          }, 1000);
                      }
                  }
              },
              xAxis: {
                  maxPadding: 1
              }
  </code></pre>
  
  <p>I want to dynamically update data in a fix x-axis range such as 9:00 to 18:00,but when redrawing happened,the max value in x-axis will increase,how can i keep the value not changed?Just like a stock chart dynamically show the stock price.</p>
  
  <p>(<a href="http://finance.yahoo.com/echarts?s=FB+Interactive#symbol=fb;range=1d;compare=;indicator=volume;charttype=area;crosshair=on;ohlcvalues=0;logscale=off;source=undefined" rel="nofollow">http://finance.yahoo.com/echarts?s=FB+Interactive#symbol=fb;range=1d;compare=;indicator=volume;charttype=area;crosshair=on;ohlcvalues=0;logscale=off;source=undefined</a>;)</p>
  
  <p>My code: <a href="http://jsfiddle.net/cruelcage/ny43Z/" rel="nofollow">http://jsfiddle.net/cruelcage/ny43Z/</a></p>
  
  <p>can someone help me?</p>