A trend location on Twitter is a tracking service that lets twitter users view the most popular and talked about topics in their area in real-time.
Twitter, despite thousands of requests from the Pakistani 'Twitterati' has not yet added Pakistan to its Trend locations. Having said that, the rising numbers of twitter users in Pakistan had forced twitter to add Pakistan as a trend location.
However, there aren't any subsets for Pakistani trends added to Twitter up till now.