Protective Capital Structures Corp. (fka PCSO)

[mimurray]

That will make sure you get a complete fill but if the market is moving fast it could be risky. AON orders go to the bottom of the line up. Unfiltered orders go through first, and faster. I don't use it because I have never had it become an issue. I would probably consider it if I got partial fills all the time. If you have a broker that gives you a lot of partials it might be worth adding a new broker.