My app is actually meant to be like a 'newsfeed for tweets' that shows the top 10 tweets of the day engaged by people you follow, so it vacuums up a bunch of tweets (from tweets engaged--liked, retweeted, etc--by friends of my users) so then it just internally counts which have the most retweets/likes. So what my app thinks is the most retweeted thing might just be reflective of my internal data set rather than what's the actual most-retweeted thing.