Cross-exchange spreads

Each row is one coin on two exchanges: where to buy cheaper on the left, where to sell higher on the right. Prices are executable — buy at the ask, sell into the bid; empty books and closed transfers are flagged.

The trade here is buy, transfer the coin to the expensive exchange, sell. Badges warn when the path is closed: a struck-through spread cannot be executed; “transfers halted” means the coin's network is paused and nobody can stitch the spread.

We compare SPOT with SPOT only: a futures position cannot be moved between exchanges, so a spot-versus-futures gap is basis, not arbitrage. This is the gap between LAST PRICES, not ready profit: two exchanges' fees, slippage and whether withdrawals are open are on you. Spreads above 20% are dropped — that is halted trading or closed withdrawals, not arbitrage. Both sides carry $100k+ turnover and a live data stream. Where an exchange publishes its book, the spread uses executable prices — buy at the ask, sell into the bid — and pairs with a book wider than 5% are dropped as thin. Where an exchange publishes no transfer status at all and a large spread stands for more than an hour, we mark that side «unconfirmed»: it usually means a closed route, though without a status we do not claim it.

Upbit prices are converted at Upbit’s own USDT rate (what you get moving money in crypto); its premium over the bank rate is now +1.7%.