No, they aren’t supported by exchanges.
IB will usually send them to an exchange after they’re marketable, meaning after your price matches a bid or ask.
Though it’s possible that IB may be doing a little extra work in the background, like trying to submit them periodically to see if an MM may match it. Actually that wouldn’t keep those orders hidden, but it’s just an example that there may be something else about hidden orders that we don’t know. (never asked IB about this but you could)
Yes, they are supported by a number of exchanges. They are live on some smart routers of the consolidators and made available to customers of the brokers that participate in the routing agreement.
Traditionally IB has not been a participant. You might want to ask them. Look at the exchange filing(s).
They work like this - assume a broker cuts a routing deal with SIG. SIG may show 10 up for the public feed but actually offer 20 up for the houses they have routing deal with. They have been around for the better part of a decade.
Is your non displayed quantity getting filled?I currently do this via IB using displayed qty, basically not showing the full qty of my order, but still having to show some qty.
Is this what you're referring to?
Is your non displayed quantity getting filled?
Is your non displayed quantity getting filled?