Left side or right side? I say BOTH, Twix has been named the #1 Halloween Candy in Colorado.

In second place we have Hershey Kisses and in third the wonderful Milky Way bars.

 The Candy Store has "looked at 12 years of sales data (2007-2018), looking in particular at the months leading up to Halloween", according to their website.

Source: CandyStore.com.