title: Dynamically position vertical StripLine in SSRS 2008
body: <p>I am building a Control Chart where the user selects an interrupt date and I would like to place the StripLine immediately <em>before</em> that. So, let's say a user selects July 2009 as their interrupt date, I'd like to place the StripLine at June 2009. Based on how I got the image below it looks like I need to use index-based placement. How can I determine where on the chart June 2009 is? The user can also select the start and end dates so it would vary chart to chart.</p>
  
  <p>If it matters the horizontal axis labels are MYYYY but the values are YYYYMM for sorting. In the image below I set the IntervalOffset to 3, not 72009 or 200907.</p>
  
  <p>I have the following chart with (what is right now) a statically positioned vertical strip line.</p>
  
  <p><img src="https://i.stack.imgur.com/pHBkO.png" alt="Control Chart"></p>
  
  <p>SSRS is not my strength so please let me know if you need additional information.</p>