title: Calculate if trend is up, down or stable
body: <p>I'm writing a VBScript that sends out a weekly email with client activity. Here is some sample data:</p>
  
  <pre><code>a       b       c       d       e      f        g
  2,780   2,667   2,785   1,031   646    2,340    2,410
  </code></pre>
  
  <p>Since this is email, I don't want a chart with a trend line.  I just need a simple function that returns "up", "down" or "stable" (though I doubt it will ever be perfectly stable).  </p>
  
  <p>I'm terrible with math so I don't even know where to begin.  I've looked at a few other questions for Python or Excel but there's just not enough similarity, or I don't have the knowledge, to apply it to VBS.</p>
  
  <p>My goal would be something as simple as this:</p>
  
  <pre><code>a       b       c       d       e      f        g        trend
  2,780   2,667   2,785   1,031   646    2,340    2,410    ↘
  </code></pre>
  
  <p>If there is some delta or percentage or other measurement I could display that would be helpful.  I would also probably want to ignore outliers.  For instance, the 646 above.  Some of our clients are not open on the weekend.</p>