title: Highstock : Multiple area range
body: <p>I search to display multiple range depends average, see this fiddle : <a href="http://jsfiddle.net/josse34/5gjne/12/" rel="nofollow">http://jsfiddle.net/josse34/5gjne/12/</a> </p>
  
  <p>rangesgreen is calculate -20% and +20% of theorical averages - 
  rangesred is defined with minimum of rangesgreen and averages - 
  rangesblue is defined with maximum of rangesgreen and averages</p>
  
  <p>rangesblue is destined to show the area when average is up of rangesgreen - 
  rangesred is destined to show the area when average is down of rangesgreen</p>
  
  <p>As well, into this jsfiddle, area is blue (it's correct) the 4 July of 2009 but area must be red the 3 July of 2009.
  I don't know how to correct this problem, the setting of</p>
  
  <pre><code>                zIndex: [number],
  </code></pre>
  
  <p>is not enought!</p>
  
  <p>Thanks for helping!</p>