I recommend:
Electronic trading: X-Trader (scalping & daytrading) bonds/indices/currencies. http://www.velocityfutures.com/
Pit and Options: http://www.alaron.com/
Electronic trading: X-Trader (scalping & daytrading) bonds/indices/currencies. http://www.velocityfutures.com/
Pit and Options: http://www.alaron.com/