Found 4 exchanges where ROLL is traded for USDT. According to the data on 26 July the most optimal price to exchange ROLL for USDT is ₮0.142 for 1 ROLL. This rate is fixed at MXC at the maximum trading volume of the pair ROLL/USDT - 103.3 ths. USDT.
The maximum daily trading volume is observed in the ROLL/USD trading pair at Kraken and reaches ₮ 116,138.31 (0.0451% of the exchange's total trading volumes) at the price ₮ 0.132 per 1 ROLL.
The minimum price to buy ROLL for USDT is 0.108 - on the exchange Ourbit.
The maximum price to buy ROLL/USDT is 0.142 - on the exchange MXC.