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As a high-frequency trader, I can tell you right now that you are just completely incorrect. I'm staring at a screen right now where we take both sides on every order, not 'skimming some money' from people. It's obvious you have no idea what you're talking about.

I would apologize for harsh language, but I have low tolerance for people who freely speak lies of matters of which they know nothing.

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If you aren't making money from having the majority of your trades inbetween two trades you are necessarily losing money. But HFT is profitable for you, which is a contradiction.

tumult: As a HFT do you guys (in the gender neutral sense) ever worry about rogue algorithms? By that I mean an algorithm that could be used to harm the market or essentially "blind" other algorithms.

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