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if you have your infrastructure dialed down (ability to handle limit queues, you know all your latencies, etc), then what hft_boy will suggest to you i'm sure will work just fine. i'm going to make a wager you don't have your infra down though, in which case, the best way to proceed is to not...

25 ms? so, i'm guessing this was done using nanex as data source? they're the only ones i know who use that arbitrary timeslice. if you're not using them, i'm curious why you chose it. [b] so, what do you record then on the trigger? midpoint? if so, most illiquid things quote garbage a lot...

timestamp the order before it goes out, and again when you get your acks. subtract. do it a bunch of times.

this is fantasy, only if one makes an extreme effort to understand it. otherwise, it's gibberish.

@jem... no one is going to counterpoint you when you think it's ok to broadly and off-topically expand the scope of your argument. in the course of a couple of posts, you've gone from collectivist laments to crony capitalism to fha loans. while i don't doubt your broad and general wisdom, i...

there's nothing stopping you as a trader in investing in the infrastructure required to compete in the hft world. just like there would be nothing stopping you as a backyard foundryman from investing in the infrastructure to become a major steel producer. there's nothing unfair about getting...

wait, aren't you the guy who spends a good chunk of time in the politics/religion forum bashing the left and pushing conservative/libertarian views? now you're talking about getting out-competed and think it's a shame that profits aren't being distributed over a wider "collection" of people...

heh, useless, would be a more apt description. you're a kinder soul than i.

good idea. pitch it to the exchanges. currently these tools do not exist. hence the need and practice of firms profiling live.

latency profiling does not automatically mean increasing latency for everyone else. it means, measuring the latency of a network. in this case, how a large qty of orders on a large qty of stocks affects internal/exchange networks. as far as honesty, you have to ask yourself, if you repeat the...

well, it's justified because on average it will only be a tiny minority of a firms actual marketable or "useful" quotes. exchanges allow the testing because these are the firms that make up most of the quotes in our markets. they're their biggest customers, and without the ability to get a good...

it's called latency profiling. not illegal. also not remotely as nefarious as hunsader alleges. when you market your business as being able to send full market data feeds over the internet, you might have an agenda though too. not something you can really do anymore without excessive...

just a follow up to that article i linked to by dick. the primary basis of his argument he justifies with his references to a nanex article here: http://www.nanex.net/aqck2/3517.html if anyone actually reads that article though, you can see it's making a set of assumptions that are just plain...

i'm aware of what he's done, hence my comment i don't think he'd be worth listening to. he's part of a small group of talking heads that does a good job of hyperbolizing and misdirecting a lot of the structural issues in the equity markets today and pointing at the source of those issues as...

goldman legal on manipulation would be interesting. dennis dick on hft would not. btw, "goes on cnbc" is like saying "performs at the circus." the idiots from themis rant about hft on their too, doesn't mean they're experts. unless, by experts, you mean experts at grinding axes.

what confusion are you referring to that you presume to clarify? who would your experts be in that regard?

the whole point is to offload things before they hit the kernel (or to make sure they never even get there). can't do that with a gpu. not yet anyway.

my argument is that yes, those market makers do have that responsibility, and can set the spread wherever they want, BUT in markets that are inherently less inefficient (after hours, illiquid etfs), they will very rarely quote their best price. in essence, the quotes you see are not an...

i didn't infer you were debating what people do. i was critiquing your assessment of it.

oh, i see. yes, i'll have to do that. thanks for the advice.