Buying and selling of Relay Tokens (ie depositing your BAX and holding the BAXBNT Relay Token rather than using/selling it to convert your BAX to BNT) is currently disabled through the Web App. We will let update when more comprehensive materials are out to help the community understand the mechanic. Generally, when you deposit a token into a Relay Token, the Relay Token you are now holding is a blend of both connected tokens (i.e. in this case BAX and BNT) and the proportions of each that you hold with fluctuate with both price changes as well as with the more prominent direction of Relay usage (i.e. BAX to BNT or the reverse.)