Quote from bespoke:
Defiant is good in theory but you'll never get those fills. Without slippage and fees, the gross per share is only 0.01. Just look at the real life fills they provide and you'll see lots of large slippage. The estimated net after slippage and fees is -0.00. Marketing in 10,000 shares of IBM? Come on....
At that time frame, milliseconds are crucial. Time it takes for system operator to send signals to C2 (http!) and have it process it, then have C2 send to your broker or instant messenger would take at least a couple of seconds I would think. I know cause I've sent signals to C2 and sometimes they can take a few seconds to process - its quite frustrating.
I've seen some good systems there but they don't tend to last. There were quite a few good ones in the past but it seems like they eventually pack up and leave because possibly they get picked up by someone large? Haven't seen anything for stocks lately that I would be interested in trading. Some nice looking futures ones though.