When interpreting dreams of exchange of any kind you should pay attention to the objects or things in the exchange and also to the advantages you have gained after making the exchange. If the exchange proves to be profitable in the dream, then it bears a positive significance and announces fortune, good luck and prosperity in your waking life. But if the exchange or deal is not profitable for you, then you should be very careful about real life undertakings and enterprises you engage into, as you may encounter failure and loss.
In order to have a complete understanding of such dreams, please see how the objects/ things you exchange are interpreted in our dream dictionary.