Sadly, there’s no account removal option available.
Use the feedback form to ask for account removal. It can be found here: http://www.marketwatch.com/support/feedback.asp
Briefly explain why you want to leave. Provide the email address you used to sign up.
URLS:
http://marketwatch.com
Please note that AccountKiller.com is not associated with the business listed on this page. AccountKiller provides easy-to-understand instructions and guides on how to cancel charges and relationships from the list of businesses on our site, we have no affiliation with these businesses.