 tick labels will be collected from the x values of the series.&nbsp;  With sortMergedLabels set to true, tick labels will be:</p><blockquote><pre>[2006, 2007, 2008, 2009]</pre></blockquote><p>With sortMergedLabels set to false, tick labels will be:</p><blockquote><pre>[2006, 2008, 2009, 2007]</pre></blockquote><p>Note, this property is specified on the renderOptions for the axes when creating a plot:</p><blockquote><pre>axes:{xaxis:{renderer:$.jqplot.CategoryAxisRenderer, rendererOptions:{sortMergedLabels: