We need to be able to measure how many coins are on exchanges. Fractional banking is a concern. There are many flaws to the proof of reserves process. I propose we create a standard of special exchange addresses. When sending coins to exchanges they must use an address that identifies that it is on an exchange. When an order happens on exchange coins are sent to a new exchange address and we can match time and amount of coins to the exchanges reported volume according to the orderbook but preserves pseudonymity.