Buy low
Pick up the coin on whichever exchange is currently quoting it cheapest.
spred.pro watches 9 exchanges at once and tells you what the gap is worth after every fee.
One pass through the four steps below captures the gap once. The money comes back where it started, so you run it again.
Pick up the coin on whichever exchange is currently quoting it cheapest.
Withdraw to the exchange paying the most. One flat network fee.
Close the position at the higher quote. The gap is now cash.
Move the balance home and start again on the next gap that opens.
Type an amount, pick a coin, read the number. Nothing to install and nothing to sign up for.
Open the calculatorGlobal settings are saved on the server. Traffic analytics keep visitor, session, device, geo, IP and funnel history until you remove the database yourself.
What a first-time visitor to this browser sees before they change anything.
Every displayed price runs through two multipliers: one global, then one for the specific exchange (set per exchange on the Exchanges tab). Leave both at 0 to show exchange prices untouched.
Visitors can't edit these. They appear in the calculator's breakdown panel exactly as set here.
Shows a message under the navigation bar on the live site.
Download every setting as a .json file, or load one back in. Import replaces all current settings.
Turn an exchange off to drop it from pricing, the ticker and the route pickers. Names of built-in exchanges are fixed, because the name is also the key that routes to the right API parser.
A custom exchange is priced from the demo feed. It won't fetch anything real, because there's no parser for it.
The reference price is only used to build the demo feed when live data can't be reached.
Priced from the demo feed by default. If the ticker you enter happens to be a real pair on a tracked exchange, it will quietly start showing live prices too — a useful side effect, not a promise.
Change the public site/domain label and logo everywhere at once — navigation, footer, mobile menu, browser branding and this panel.
Replaces the default mark. Saving from /adm777 publishes it to the site config.
First-party visitor analytics: geo, devices, IP history, sessions, actions and conversion.
A timestamped list of what happened on this device: theme and language switches, coin and route selections, saves. It is not visitor analytics — a static page has no way to see other people's visits or IP addresses.