Added IMDb to my Roku tv and am having a hard time navigating it to find my watchlist, could someone help me
Just do everything through the IMDB channel.
At the top of the screen you should see "Continue watching" right above "Popular TV."
I am thinking that if you have watched something on IMDb TV another way, it may not show up. I would think it only keeps track of what you watched via the channel.
Doesn't look like the Roku version of IMDB's app includes the Watchlist -- something to request from IMDB as they provide the Roku-compatible version of their app.
In the Roku IMDB channel app, be sure you log into your IMDB account if you have not already (upper right corner of screen). Once logged in, there IS a "Continue Watching" row, though. So if you've started viewing something on your computer, you should then be able to pick it up on your Roku