Hi All,
Today i just got Trendsetter Badge. 
For my wordpress. plugin.
but i have question about this badge.
i am new to Envato Community. so i am asking theme 
Hi,
Congrats with your trendsetter badge ! this is a message from Envato about how this feature works:
“
We measure the level of “excitement” that we think the community shows for each item within a specified period of time – as buyers interact with an item, by viewing it, purchasing it or rating it highly, we accumulate these interactions into a level of measured excitement that tracks changes over time. We’re able to calculate the “trending-ness” of an item by looking at how excitement levels have increased or decreased recently, and translating this into a score which we can use to compare items with each other. Items which have seen a rapid growth in excitement in a short period of time will be displayed with a “Trending” indicator when seen in search and can be filtered within search results.
”
Hope this will clear some things up 
Thanks. but I have no sales .then how it can be a trending item ?
The trending feature also looks at page views, comments etc. You can view your product page statistics over here: http://codecanyon.net/item/woocommerce-role-based-pricing-pro/14120734/analytics/page-views
Hope this will answer your questions.