Based on the 30 day trading volume of a user, the trading fee will be adjusted. The maker and taker fee on trades will be 0.25% Once a user has traded 100 BTC or more in the previous 30 days, a sliding fee scale will apply. For eg. if a user has traded 103 BTC in the last 30 days, he will have a maker fee of 0.15 and a taker fee of 0.24%. Please refer to the scaling fees table for more details