title: How can I implement a stock volume chart using core plot on iPhone?
body: <p>I'm writing a stock charting application on iPhone using core-plot. What kind of chart should I use to plot the volume chart? Since I will also need to overlay the price charts onto the volume chart, how should I go about doing this?</p>
  
  <p>Here's an image for reference (By no means am I trying to reimplement stockcharts functionality, just wanted to create a simple charts with volume information overlaid on the price charts):</p>
  
  <p><a href="http://www.imagechicken.com/uploads/1264166887000577000.png">example http://www.imagechicken.com/uploads/1264166887000577000.png</a></p>
  
  <p>Thanks!</p>