In Keyword Ranking or Keyword Research within App Intelligence, some keywords will have the "calculating..." message because it is the first time that the particular keyword started getting tracked in our system. This means that there exists no cached data and the traffic and ranking is being calculated by our system.
Please wait 24-48 hours for our system to calculate the data, and your keyword rankings will show up. Usually this message happens with long-tail keywords because they are not searched for as often on the app stores. If it doesn't update, please contact firstname.lastname@example.org