Anyone have Schweser Study Notes Book 2, Page 180 - Example: Bid-ask cross rates. I don't understand the conceptual difference between the AUD / $ bid vs. the AUD/$ ask from the perspective of the AUD dealer. Aren't both describing how an Aus dealer would go about buying 1 USD? Or is one describing how the Aus dealer would go about buying 1 USD and the other is describing how he would sell 1 USD?