It would be better to have a platform which can connect to several brokers simultaneously... but platforms that i tried to test are quite difficult for me. i think that finally i'll use serious soft, with wide functionall but for now i want the simpliest one to try...Quote from intradaybill:
Do you require the platform to have trading system development capabilities or just to send trades to the broker online?
If not, I recommend you skip the crap and go directly to IB. Not the best software (TWS) but something you can use in the future if you go the API way.
QuoteTracker is also a good program and you can send your trades to several brokers:
http://www.elitetrader.com/so/?action=view&SR_ProductID=33