Will probably only be available to HFTs now. https://www.bloomberg.com/news/articles/2020-08-08/robintrack-chronicler-of-day-trader-stock-demand-to-shut-down
Robintrack.net, the website whose hourly updates on retail stock demand became a minor obsession of Wall Street, will end its service after owners of the Robinhood investing app curtailed access to the data on which it ran.