title: Adding previous value column in Power Bi for 80.000 rows
body: <p>I am adding custom column with this formula <code>  try #&quot;Added Custom&quot; { [Index] -1 } [Action Type] otherwise null</code>
  that show previous value. It is show normal way <a href="https://i.stack.imgur.com/6ea2S.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/6ea2S.png" alt="enter image description here" /></a>
  But when I am trying to close &amp; apply I got stuck with loading <a href="https://i.stack.imgur.com/ius9Y.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ius9Y.png" alt="enter image description here" /></a></p>
  <p>My data is not that huge. Sth like 80.000 rows and 25 columns.</p>