If it was up to me I'd slip it in at the top between the search and the tweets. Conceptually it is also where it belongs: the list of tweets is arrange chronolo

If it was up to me I'd slip it in at the top between the search and the tweets. Conceptually it is also where it belongs: the list of tweets is arrange chronologically with the latest at the top. Trending topics are all about the moment. They belong at the top. When you're in the middle of your tweets you are focused on moving upwards in the list and forwards in time towards the latest events. It is distracting to have the here-and-now intrude - you are still in the past. However if you make your way to the top you have read all the tweets and are conceptually right-up-to-date - what better time to see what else is happening in the world in the here-and now. Plus if you've run out of tweets you'd be much more likely to have a look at what else is going on.