Comment Re:Fucking Casuals. (Score 2) 303
The “within a few seconds of each other” shows that you have not really paid attention here. The problem is that if you are trying to place a single composite order on multiple markets. Unless you time your partial orders to arrive at their respective markets within 10 milliseconds or so, you will find that someone has magicallly swooped in to the markets that got your orders 20 miliseconds later than the others and bought what you were trying to buy and is now offering them for marginally more.
The way that they are doing this is by watching for your orders and predicting that you will go to other markets as well, and then having faster network routes than you can have to all of the markets. While this might not be illegal, it is copletely unfair. And more imporantly this means that people are making money from the markets (sucking money out) without providing anything like a benifit to the market as a whole.