Found 3 exchanges where ARK is traded for BTC. According to the data on 22 July the most optimal price to exchange ARK for BTC is ₿0.0000016 for 1 ARK. This rate is fixed at CoinEx at the maximum trading volume of the pair ARK/BTC - 0 BTC.
The maximum daily trading volume is observed in the ARK/USDT trading pair at BitVenus and reaches ₿ 3.58 (0.0208% of the exchange's total trading volumes) at the price ₿ 0.0000016 per 1 ARK.
The minimum price to buy ARK for BTC is 0.0000016 - on the exchange CoinEx.
The maximum price to buy ARK/BTC is 0.0000017 - on the exchange Upbit.
Внимание: у части рынков ARK аномально широкий спред — такие котировки могут быть ненадёжными (низкая ликвидность или нерыночные сделки). Сверяйтесь с объёмом и несколькими площадками.