Found 1 exchange where ROCK DAO is traded for USDT. According to the data on 7 October the most optimal price to exchange ROCK for USDT is ₮0.00034 for 1 ROCK DAO. This rate is fixed at Huobi Global at the maximum trading volume of the pair ROCK/USDT - 1 M USDT.
Warning: some ROCK markets show an abnormally wide spread — those quotes may be unreliable (thin liquidity or off-market trades). Cross-check the volume against several venues.