Found 1 exchange where UMA is traded for BTC. According to the data on 2 September the most optimal price to exchange UMA for BTC is ₿0.0000046 for 1 UMA. This rate is fixed at WhiteBIT at the maximum trading volume of the pair UMA/BTC - 0 BTC.
The maximum daily trading volume is observed in the UMA/USDT trading pair at Phemex and reaches ₿ 3.33 (0.0321% of the exchange's total trading volumes) at the price ₿ 0.0000046 per 1 UMA.
The minimum price to buy UMA for BTC is 0.0000046 - on the exchange WhiteBIT.
The maximum price to buy UMA/BTC is 0.0000046 - on the exchange WhiteBIT.
Warning: some UMA markets show an abnormally wide spread — those quotes may be unreliable (thin liquidity or off-market trades). Cross-check the volume against several venues.