Cross-exchange spreads

The same coin rarely costs the same everywhere. The scan walks the exchanges, finds pairs whose difference clears a threshold, and shows where it is cheap and where it is dear.

This is a quote difference, not a profit

Every percentage here is the raw difference between two quotes: before taker fees on both legs, before slippage, and before an on-chain withdrawal and its confirmations, all of which sit between them. It is a pointer to where to look, not what you would keep.

The product says so on the board itself rather than in small print, because the difference between "a 1.4% gap" and "1.4% of profit" is the whole difference between an instrument and a con.

Spot and perpetuals are never compared to each other

They are scanned separately. A perp trading above spot is funding doing its job, not a price dislocation, and putting them in one list would present an ordinary state of the market as an opportunity.

Two filters, both load-bearing

A minimum gap: pairs below it are never returned at all — the server applies the threshold, so lowering it requests a wider board rather than revealing rows already fetched.

A minimum 24-hour turnover on each leg: both exchanges must show at least that much. A gap on an exchange where nothing trades is not a trade, and without this filter the board would consist of them.