Yes you can execute orders from the software and no it isent slow for day trading ( look at the 2nd screenshot here http://www.quotetracker.com/screens.shtml). QT only has a few brokers you can trade direct from the software with you can see the list here http://www.quotetracker.com/qsources.shtml the list of borkers you can use is under "Integrated Trading Supported Brokerages" TD Ameritrade is one of them, not only that TD Ameritrade is a QT Sponsoring Brokerage so you get the software with no ads for free.