i currently trade at a prop firm and i've come across a high-frequency trading strategy i'd like to start using, but rather than doing it at the firm and having to cut them in on my profits, i'd like to break off and start trading on my own. my problem is i don't know much about back office stuff or the technical nature of the business. to properly execute my strategy (which will involve doing about 50-100 round trips a day and trading about a quarter million to a million shares a day) i know i need a very fast platform that can execute my commands instantaneously and i need a very low commission structure - something like $.20-$.40 per thousand. my strategy also relies heavily on being able to get good fills and having good routes at my disposal. what are some b/d's i should be looking at and what criteria should i go by when making my choice? any help will be greatly appreciated here. thanks in advance.