As of August 2020, Robinhood has shut down the API that Robintrack used to collect popularity data. As a result, the leaderboard page and popularity changes pages will no longer show data, and no updated data will be shown for any assets.
Robinhood has indicated their interest in bringing back the data in some form at some point in the future, but no details have been shared. Until that time, the site will remain as-is with all previously collected data. The full database is still available for download via the Data Download page.
This page shows the stocks that have the largest changes in popularity according to the critera picked below. All displayed numbers are in terms of Robinhood accounts holding shares of each asset.
Robinhood doesn't support shorting, so these represent long positions. However, fractional shares do count.