Comichron is a resource website for comic books. Comichron tracks monthly order data for comics that comes from comic book distributors who serve comics shops in North America. These figures come in two varieties: Preorders, for information before February 2003, and Final Orders, for information from February 2003 and later.
The rankings of comics preordered from Diamond Comic Distributors appear there beginning in 1995 to current date.
The Comichron numbers do NOT represent actual sales to customers, they represent the amount of comic books shipped to retailers. There is currently no way to track the exact number of sales in comic shops.