title: plotly.js waterfall chart with different colors for up and down
body: <p>I want to create a waterfall chart using plotlyjs which shows ups and downs as compared to its previous value. Up should be represented by green color and down with red color.  </p>
  
  <p>How can I create such a graph using plotly.js?  </p>
  
  <p>The example given on the plotly site has different colors for different value ranges and it has no connection with ups and downs.</p>