Would any Trader find it useful to have a serive that aggragated the information listed below on all major market centers. Subscribers would be updated as any changes were made. Thank you for the feed back. 1. Market center liquidity pricing schedules (Add, remove, routing of liquidity) 2. Liqudity flags associated with order execution. 3. Proper calculation of SEC, TAF, and NSCC fees. 4. Major market centers hours of operation and holiday schedules.