Which markets/exchanges operate dark pools?

[NanoTick]

It's brokerage firm dependent. Not up to anything you can do. Preferenced orders are generally used when a firm sets a routing deal with an MM who only wants to show "10 up" , but would actually fill more for a preferenced firm so as to not have to ship the balance.

You are talking about the "SMART" routing most brokerages offer, but you can also use the direct routing, i.e. sending orders directly to the exchanges of your choice, like AMEX or PHLX or CBOE. My question is if these exchanges have dark pool liquidity.

 

[ajacobson]

Not talking about smart routing. The option industry allows a MM to offer more size for a preferenced order. I believe all the exchanges make it available, but your access will depend on the routing broker. It's nothing you can control.

 

[NanoTick]

Not talking about smart routing. The option industry allows a MM to offer more size for a preferenced order. I believe all the exchanges make it available, but your access will depend on the routing broker. It's nothing you can control.

Still not clear to me. The question is, essentially, which exchanges have all the limit orders displayed, regardless where the orders are from (MM or whoever).