Found 2 exchanges where BitTorrent is traded for EUR. According to the data on 4 September the most optimal price to exchange BTT for EUR is €0.00000024 for 1 BitTorrent. This rate is fixed at Bitvavo at the maximum trading volume of the pair BTT/EUR - 4.3 ths. EUR.
The maximum daily trading volume is observed in the BTT/TRY trading pair at Paribu and reaches € 1 569 712.97 (1.93% of the exchange's total trading volumes) at the price € 0.00000026 per 1 BTT.
The minimum price to buy BTT for EUR is 0.00000024 - on the exchange Bitvavo.
The maximum price to buy BTT/EUR is 0.00000027 - on the exchange CEX.IO.
Warning: some BTT markets show an abnormally wide spread — those quotes may be unreliable (thin liquidity or off-market trades). Cross-check the volume against several venues.