Most traders meet crypto arbitrage the same way: they hear that the same coin can trade at slightly different prices on two exchanges at the same moment, and they want a way to actually see those gaps as they appear. That is exactly the job the BJF Free Crypto Arbitrage Scanner sets out to do. It is a free Windows application from BJF Trading Group that watches prices across more than thirty spot exchanges and surfaces the live price differences, ranked and filtered, so you can judge for yourself whether an opportunity is real.<\/p>\n\n\n\n
The important thing to understand up front — and the vendor is refreshingly honest about it — is that this is an identification tool, not a trading robot. It shows you where the spreads are; it does not connect to your accounts, hold your API keys, or place a single order. That design choice is the source of both its appeal and its limits, and it is the lens through which the rest of this review looks at the product. Below we break down what it does, how it works, who it suits, and where the free tier stops and the paid tools begin.<\/p>\n\n\n\n
The BJF Free Crypto Arbitrage Scanner is a desktop application that monitors the order books and ticker prices of many cryptocurrency exchanges simultaneously and highlights the moments when the same trading pair is cheaper on one venue than on another. BJF Trading Group, the company behind it, is a long-standing developer of trading software for both forex and crypto, and this scanner is positioned as the free, entry-level member of a wider family of arbitrage products.<\/p>\n\n\n\n
In practice the scanner is a window onto the market rather than an actor in it. It pulls public price data from each exchange, compares it in real time, and presents a list of live spreads with the venues involved, the size of the gap as a percentage, the available volume, how long the opportunity has persisted, and an estimated gross profit. The scanner then stops. The vendor states plainly that the free tool "does not execute — it identifies," has "no API key integration," and "cannot place orders." Everything after the spread appears is down to you: you decide whether it is worth acting on, and you place the buy and the sell yourself on the respective exchanges.<\/p>\n\n\n\n
That identification-only model is deliberate. It keeps the tool free, it removes the security burden of handing API keys to third-party software, and it lowers the barrier for newcomers who want to understand how crypto arbitrage behaves before they risk anything automated. The trade-off, which we return to later, is that a human in the loop is slower than code, and in fast markets some of the spreads you see will have narrowed by the time you could act on them.<\/p>\n\n\n\n
Coverage is the scanner’s headline strength. BJF lists more than thirty spot venues, including the major Tier-1 exchanges — Binance, Bybit, OKX, Kraken, KuCoin, Bitget, Coinbase and Crypto.com — alongside a long tail of second-tier and regional exchanges such as Bitfinex, Gate.io, HTX (Huobi), MEXC, Bitstamp, Poloniex, BingX, Phemex, WhiteBIT, LBank, XT.com, CoinEx, AscendEX, BitMart, HitBTC, CEX.IO, Bitrue, ProBit, DigiFinex, EXMO, Nominex and Bithumb. That breadth matters, because the widest and most persistent spreads often appear not between two Tier-1 giants but between a large, liquid venue and a smaller one that is slower to re-price.<\/p>\n\n\n\n
Refresh speed is where expectations need to be set honestly. The scanner updates prices "every few seconds," and the rate depends on each exchange’s own API rate limits. BJF indicates that Tier-1 venues typically refresh in under two seconds, while smaller exchanges can lag to somewhere in the three-to-eight-second range, and that the feed can show gaps during very high-volume periods when exchanges throttle requests. For a monitoring and learning tool this cadence is perfectly serviceable, but it is a world away from the sub-second streaming the company reserves for its paid bot. The diagram below shows the basic path that data takes through the tool.<\/p>\n\n\n\n