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Just do it for free, then you'll have nothing to worry about.

OP question as I interpreted it was about margin interest ("I owe the full margin rate on the stock holdings right?") Buying power and such is a totally separate issue. For treasury bonds, the margin requirement depends on duration - see...

Correct. Assuming you have no other cash in the account, your net cash position would be -50K, and you would pay margin interest on that. The tbills do not offset this in any way and the margin requirement has nothing to do with how margin debit interest is calculated. All that matters for...

non-paywall link: https://archive.ph/BWAPU

I'm not an expert on this by any means but my understanding is the blatant skipping the line hidden order type stuff was all removed years ago after a SEC crackdown. BATS got a big fine for the secret hide not slide variants for example. If it's still going on you'd think someone would be...

transaction costs are a huge factor with low priced stocks. they will appear more profitable if you are not accounting this properly

Right, it makes sense that the marketable orders don't go to pearl because of the spreads. It doesn't make sense that Smart Default is almost never adding liquidity though... of course I suppose it's possible that it's simply a piss poor algorithm, but I thought IB prided themselves on their...

Do I understand you correctly or something close: Smart(Default) had 95+% marketable SmartMaxRebate had 60*(1-.89)+40*.95 = 45% marketable This makes Smart(Default) seem completely broken

That's great, thanks for adding more details. Surprisingly, it sounds like there could really be something to this :) Are you trading a wide variety of symbols or could there be symbol bias or price bias (e.g. only trading low priced or penny stocks)? Are you able to break down your data...

You are thinking of it wrong. If you have an edge on one exchange then this can't be changed by trades that happen elsewhere. To the extent that such information has any effects, that is already accounted for in the results you are getting.

There's so much missing information here I don't think we can really conclude anything. What is the definition of a "trade" (1 fill or 1 algo execution). Goes to significance. How are these trades distributed (how many stocks, how many days, etc). Big difference between 1000 stocks x 15 days...

This could just be a selection effect where the trades on MIAX Pearl only happen when there is some natural slow liquidity there. MIAX Pearl only has a tiny fraction of market share so I'm guessing it doesn't even have liquidity at NBBO the majority of the time. If you were somehow able to run...

If you are just doing a long term bet on this you don't need market data, just use a limit order and adjust it till it fills. Alternatively, you can use the FOPs on CME for individual currencies, the CME data is much cheaper.

The ICE futures and FOPs are available on IB. The underlying symbol is DX. https://www.interactivebrokers.com/en/index.php?f=2222&exch=nybot&showcategories=FUTGRP https://contract.ibkr.info/v3.10/index.php?action=Details&site=GEN&conid=638174999

most likely not but I don't have a crystal ball. if there's even a 1 or 2% chance of it happening then for me personally it's not worth the variance

feels like a lot of risk for an extra 40bps

archive link: https://archive.li/BCdLe

bruh that is literally what the first reply to this thread said, go back and look.

Right, so if you made a graph of the CDF, it would be Y=0.5 at 0. The graphs you posted aren't graphs of the CDF, they are of the PDF.

It does not follow from the probability above/below the mean being 0.5, that the peak of the graph would be at 0.5 on the Y axis. Try evaluating the PDF for sigma=1, you should see that the graphs are correct.