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Steve, you're absolutely right in that innovation is the key here (and in fact you've come up with a couple of use cases that we hadn't even considered yet!)
We're just scratching the surface here. We're seeing the initial implementation of twilight pool functionality where venues are revealing the BBO for a limited time in the beginning of a session before moving to twilight mode. We're also running twilight
pool heat maps appearing with colour coding to reveal activity such as better bids, offers and matching, for example.
But there is no reason why this kind of functionality can't be extended to address the typed of situation you've highlighted. Regulation permitting of course ;)