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Roughly speaking, a marketable order is one which can be filled immediately, because it is priced at the current market price or better. (Better here means higher than ask for a buy or lower than bid for a sell). Market orders are always marketable unless there is no quote on the exchange.

Actually the wording of the order protection rule is that it is quotations (limit orders) which are protected, not marketable orders - though logically if one is protected then so is the other. Only visible limits are protected as hidden orders cannot become NBBO.

Are you just assuming that 8x commissions is greater than all your real life costs combined or did you actually verify that this is true? IB commission = 0.2bp => 8x commission = 1.6bp The spread alone on some pairs can be multiples of that. Financing costs can also be in the same order of...

OP said he was doing this instead of finding regular job. I'm fairly certain no one on this earth has enough edge to make a living trading 1 share. If OP was trading then you have to assume he had an edge, or at least thought he had an edge. Trading without an edge isn't trading it's gambling.

"up and down 20% in a month" "funding has run out" "negative impact on my life" Sounds to me like you were probably very undercapitalized and taking wayyyy too much risk to compensate. In this situation, failure is practically guaranteed. 20% movement in 1 month is just insane. 2% per month is...

Very nice, sounds like the "best of both worlds" idea might actually work out then. IB's interest rates with lightspeed/lime's low latency execution. I think I read somewhere that the minimum to set up this type of account is $1MM is that correct? Just wondering if I am anywhere close to being...

Thanks! Any idea about my question about margin interest?

Hi Robert, I run some strategies that use high leverage overnight, and I pay a lot of margin interest. For this reason I have been stuck to IB with their super low interest rates that no one seems able to beat, and also the fact that they rebate interest on cash from shorts. Recently I have...

Very interesting, thanks a lot for digging that up for us! Looking forward to playing around with it when I get some time.

Statistical significance of a backtest can not be evaluated in a vacuum. It also depends on the process that was used to create/discover the trading rules. What is your process for creating your systems, do you understand the concept of curve fitting and are you taking appropriate steps to avoid...

No because fire alarms are pretty obvious and I do my due diligence before deploying algos. Not sure what your point is anyways. It's clear to everyone in this business that trading involves tons of uncertainty and unexpected events. Reacting to being wrong is always part of the game and humans...

Jigsaw, taking a step back here, I believe we might just be arguing semantics here. What you believe counts as mathematical or not is different than how I see it. I don't believe that "event driven" is opposite of "purely mathematical". I just see it all in terms of information processing and to...

You just don't get it. Restating what I said in my first reply to you, there is nothing magical about being a human trader. If humans can react to events so can algos. It's all about processing the available information, which is ultimately a mathematical process.

So you were never interested in the answer, you were just setting me up for what you consider to be a BTFO. Except it really isn't one at all. The probabilty of someone pulling the alarm is just part of the model. Also, 3:20 - JigsawTrading is arrested for false alarm, caught blue handed.

Predicting the exact position of each individual with 100% accuracy would require measurement and computational power that does not exist today and will probably never exist, but is not impossible in theory. If you had complete information about every subatomic particle making up all the people...

Does anyone have any insight on how the "ETF pairs arbitrage" system works? It looks to me like it has a real edge which is different from any that I'm familiar with. What I gathered: -It is simply timing the nasdaq 100 index both long and short (there is no actual "arbitrage" involved here)...

Wrong. If you are resident in Canada, you are taxed on foreign source income, modulo any deductions available via double taxation treaties.

Agree and Disagree. Ultimately everything is a math problem and there is nothing that a human trader does that is magic that can't also be done by an algorithm. Difficult yes, but not impossible. It's true that engineers often fail in markets. But many of the best traders are also engineers...

Why would "you" be transferring anything from somebody else's bank account? This makes even less sense than before. What is your relationship with this other person?

IIRC registering a corporation can be done online for a few hundred bucks, that is not the expensive or hard part. Office space, employees and accountants will be your main costs, you are probably looking at ~30K/year minimum to do a fully legit setup (20K for small office space, 10K for part...