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Quote from nitro:
How would you be able to tell if it was NX'ed or not using IB?

Can't (unfortunately). I guess based on fill speed. If it's just second or two, then I assume it was NX. I suppose it could be a spec that drank too much coffee :)

Yes, TMBR continues to provide executions as well. I even got price improvement (0.01 in a 0.03 spread) the other day on an NYSE stock for the first time.
 
Quote from alanm:



In practice, though, it seems that I rarely get an NX execution, even when the stock should be eligible (normal market, quote size > 1x, order < 1099). I'm quite surprised when it does happen. Is there something about a limit of one NX every so many seconds that is applied per firm (not per account) that might explain this, or is there some other reason I might not be getting NX execs?
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Confirmed that the NX limitations at IB are by account (1 per every 30 seconds) and NOT applied by firm.
 
For those of you that use NX elsewhere, is there something I'm missing about what should qualify?

I thought that if the quote size is > 1, and the order was 1099 shares or less, it was supposed to be eligible unless it was a "fast market" (where the quote size is usually 1 anyway).
 
Quote from alanm:

Quote from nitro:
How would you be able to tell if it was NX'ed or not using IB?

Can't (unfortunately). I guess based on fill speed. If it's just second or two, then I assume it was NX. I suppose it could be a spec that drank too much coffee :)

Yes, TMBR continues to provide executions as well. I even got price improvement (0.01 in a 0.03 spread) the other day on an NYSE stock for the first time.
More...
Okay.

nitro
 
Quote from def:



Confirmed that the NX limitations at IB are by account (1 per every 30 seconds) and NOT applied by firm.
More...

which begs the question-

can a specialist see your account #, or just the firm your order is coming from?
 
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