Thank you for this comment. It is very helpful.You're site says exchange but your concept looks a lot more like some sort of ATS internalizer from what little info there is.
The IEX is the 13th exchange in the U.S.. It took an enormous amount of regulatory red tape and VC from nearly a dozen large companies. That is a legit lit exchange, what I think of when I saw your claim of being an exchange.
You talk of being fair, however I see the IEX model actually making a level playing field. For example the IEX places price (bids & offers) over queues which have been gamed to death by spoofing/layering on the other exchanges. They have a built in delay to prevent predatory front running HFTs from operating whereas the good market making HFTs like this. They do not allow collocation, in fact you have to be at least 42 miles from their exchange.
Maybe I just didn't understand what you are doing. Perhaps this is more about providing tick data for the API users and not about matching buyers with sellers.
I have not looked at the IEX (I will now!) but this business of introducing delay concerns me. I'm really trying hard on Ritchie not to introduce lag or delay: I want it to be supersonically fast. The key is to make it supersonically fast for everyone, not just for those who can afford a 1ft direct fiber connection from an ASIC chip to the exchange!
That being said, I will read up on the IEX model and get back to you.