Halloween is the 2nd most commercially successful holiday, with Christmas being the first. People spend as much as over $2.5 billion during Halloween on candies, costumes, decorations and parties.
Halloween candy sales average about 2 billion dollars annually in the United States.
Chocolate candy bars top the list as the most popular candy for trick-or-treaters with Snickers .
It is believed that the Irish began the tradition of Trick or Treating. In preparation for All Hallow's Eve, Irish townsfolk would visit neighbors and ask for contributions of food for a feast in the town.