Users on the Pro-version and Enterprise plans have Unlimited watch lists. The ability to create a watch list is available at multiple steps.
Step 1 - Open Watch List Selection
By clicking the chevron at the top of the page, watch list selection is expanded and the ability to create a watch list is revealed:
Step 2 - Create New
Click the Create New button:
Step 3 - Enter a Watch List Name
In the Watch List Name field, enter the name of your new watch list:
Note: You will notice that you can not save a watch list without first adding an app to it.
Step 4 - Search for an App
In the Search Apps search bar, enter your search phrase:
You will see a list of search results appear as you type. By refining your search the list of results can be narrowed or widened.
Step 5 - Add to Watch List
Beside the app you would like to add to your watch list click the Add to Watch List button:
You will now see the Save button is active. You can choose to save your new watch list at this point. Clicking Cancel at any time will exit without saving your watch list:
Step 6 - Adding More Apps / Removing Apps
By editing your search phrase you search for additional apps, adding up to 5 apps to your watch list:
You can click Remove next to an app you have added to refine your list before saving: