The Bookmark option is and Add Alert option is
Open any screener to find a bell icon at the top-right for adding alerts and a bookmark icon next to it, as shown below.
Once you click on ‘Alert’ you can select the alert interval, choose the group, and Entry/ Exit type for the alert to be delivered.
Interval: You can select an alert frequency for the screener from 15 Min, 30 Mins, Hourly, Daily, and more from the drop-down.
Group: You can select a stock group, Index, Portfolio, or Watchlist for receiving the screener alert.
Type: You can set the alert based on the entry and exit of the stock in the screener.
Once you have selected your preference you can choose ‘Add Alert’ and the alert will be saved for your screener.
Selecting these options will add the screener to your bookmark list, and alerts will be sent to you regarding any updates or changes to the screener. The icon changes, as shown below, to indicate that the screener has been successfully added to your bookmarks or alert list.