www.ampfutures offer demo real time without charge openecry , AT,Ninzja ,CTS t4 If you by tradeking ,you can try optionsxpress.com But this demanded open account with 0 $ to have possibility use real quote simulator P.S. Autor is not related to ampfutures,oxps and is not payed agent for any company
I use and recommend IB. However, their paper account can only be used when you have a real account, and the minimum to open a real account is $10k. Can't be beat for range of products available to trade though.