title: iPhone CorePlot: Chart with user Touch Event
body: <p>I am now using Core-plot to develop application.
  I am looking for some touch event for user touch one point of the chart,
  then it show up the price.</p>
  
  <p>When i take a look of the CorePlot website,
  It has a application show what i need
  <a href="http://code.google.com/p/core-plot/wiki/AppsUsingCorePlot" rel="nofollow noreferrer">http://code.google.com/p/core-plot/wiki/AppsUsingCorePlot</a></p>
  
  <p><img src="https://i.stack.imgur.com/TJu1Q.png" alt="enter image description here"></p>
  
  <p>I really want to do this function by Core-plot, 
  i am now using CorePlot 0.4
  i want to do the following function
  <img src="https://i.stack.imgur.com/GcUQZ.png" alt="enter image description here"></p>
  
  <p><img src="https://i.stack.imgur.com/6fs6v.png" alt="enter image description here"></p>
  
  <p>I really want to have a touch event which can show the specify price of the point user touch.</p>
  
  <p>Thank you very much!!</p>