Gemini, a New York-based bitcoin exchange led by Winklevoss brothers, announced on Wednesday that it has decided to adjust its existing flat fee schedule to a “real-time, dynamic maker-taker fee schedule”. The company says that the decision was made to best encourage an active, stable, and efficient marketplace.

In the introductory period of the program, the company says that most favorable fee and rebate rates will be available to all its customers for 30 days (starting 01 March), during which they will receive a 15 bps (0.15%) rebate on all liquidity-making trades and be charged only a 15 bps (0.15%) fee on all liquidity-taking trades.

Following the introductory period, users’ fees and rebates will be based on their gross trading volume and liquidity-making buy/sell ratio over the previous thirty calendar day window. Fee rate will be reassessed every 24 hours and adjusted accordingly. Once the real-time fee system is activated for their accounts, users will be able to look at their activity feed to view their current fee rate.

Gemini said that the base fee for all liquidity-making trades is 25 bps, however, fees are reduced based on the gross trading volume as well as the ratio of liquidity-making purchases and liquidity-making sales (both measured in BTC) over a trailing 30 calendar day window.

CoinDesk reported that the revamp of the fee schedule follows the criticism of Gemini’s pricing model. Bitcoin traders said earlier that the exchange charges both buyers and sellers on each trade, something which could potentially drive away retail traders – a segment vital for improving liquidity.