title: min, max threshold in highcharts
body: <p>@Hightcharts stock
  How can i have two threshold's ? for min,max in this graph <a href="http://jsfiddle.net/CYJAk/16/" rel="nofollow">http://jsfiddle.net/CYJAk/16/</a></p>
  
  <p>As an example in here there's only one threshold set
  <a href="http://jsfiddle.net/gh/get/jquery/1.6/highslide-software/highcharts.com/tree/master/samples/stock/demo/area/" rel="nofollow">http://jsfiddle.net/gh/get/jquery/1.6/highslide-software/highcharts.com/tree/master/samples/stock/demo/area/</a></p>
  
  <p>or</p>
  
  <p>instead of threshold option in highcharts, is there way i can show red spots/points when
  they fall out of min:max range?</p>