To catch the trends, there's a trend box on the left side of your twitter page, when you use the computer version.
In the mobile/tab app, I believe you have to go to the "discovery" tap (or something like that. My twitter is in French...) and there are the trends. If you click on "show all" you can see all the trends, whether worldwide or locally.
I'll still be at work. I'll be able to tweet, but I'm not sure I'll be able to capture the trends.
I've been playing with the trend choices and I don't have one that says "Show All."
Right now I'm set to monitor trends in New York but I will change that to whatever if I could figure out what to change it to. I don't think we'll get #whitecollarforS6 trending worldwide so we should split up the areas to monitor.
Those of you who know what we should do, please let us know.