Quote from dersu:
Please be reasonable. Our approach does not tolerate the risk of this magnitude. It is an arbitrage - the system takes position for a period of fraction of second and tries to unwind it in another market as soon as we got a fil or partial filll. If it fails to unwind it for profit for a reasonable period (usually 5 seconds), a stop order is issued. As a result losses are pretty limited. So as you can see for our model speed is everything. That is why we process market data in-house because other solution fail to meet necessary latency requirements.
Thx, Dersu