The latest articles on DEV Community by Micha (@micha_919009f8389). https://dev.to/micha_919009f8389 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4069044%2F8ca3f1f8-8290-4437-9a29-9a9eec03dba2.png https://dev.to/micha_919009f8389 en Micha Sat, 08 Aug 2026 16:31:18 +0000 https://dev.to/micha_919009f8389/spot-cross-exchange-crypto-spreads-in-minutes-open-source-monitor-mit-3pb0 https://dev.to/micha_919009f8389/spot-cross-exchange-crypto-spreads-in-minutes-open-source-monitor-mit-3pb0 <p>Ever wondered how far Bitcoin’s bid/ask drifts between Binance, Kraken, Coinbase, Bitget, and KuCoin — after fees?</p> <p>Crypto Arbitrage Monitor is an open-source dashboard that polls public top-of-book prices across those five venues, builds a buy/sell matrix, and streams fee-adjusted spreads live. It does not place trades. It shows indicative opportunities so you can see where spreads open up.</p> <p>Why try it<br> Five exchanges, public APIs only — no private keys<br> ~3s poll cycles with WebSocket/STOMP updates (no frontend polling)<br> Liquidity chips + on-demand order-book depth when you click a route<br> 50 markets (USD + USDT), selective polling for what you enable<br> Full stack in Docker Compose: Postgres + Spring Boot + Angular<br> </p> <div class="ltag-github-readme-tag"> <div class="readme-overview"> <h2> <img src="https://assets.dev.to/assets/github-logo-5a155e1f9a670af7944dd5e12375bc76ed542ea80224905ecaf878b9157cdefc.svg" alt="GitHub logo"> <a href="https://github.com/schiessti-afk" rel="noopener noreferrer"> schiessti-afk </a> / <a href="https://github.com/schiessti-afk/CryptoArbitrageMonitor" rel="noopener noreferrer"> CryptoArbitrageMonitor </a> </h2> <h3> </h3> </div> <div class="ltag-github-body"> <div id="readme" class="md"><div class="markdown-heading"> <h1 class="heading-element">Crypto Arbitrage Monitor</h1> </div> <p>Monitor live cryptocurrency bid/ask prices across <strong>Binance</strong>, <strong>Kraken</strong>, <strong>Coinbase</strong>, <strong>Bitget</strong>, and <strong>KuCoin</strong>, compute indicative cross-venue spreads after taker fees, and stream results to a real-time dashboard.</p> <p>This application does <strong>not</strong> execute trades. Displayed values are <strong>indicative cross-venue arbitrage opportunities</strong> based on public top-of-book prices and configurable fee estimates. The dashboard shows <strong>top-of-book liquidity chips</strong> and <strong>on-demand order-book depth</strong> when you select a route; these remain indicative and do not model full slippage, withdrawal fees, transfer time, or execution risk.</p> <div class="markdown-heading"> <h2 class="heading-element">Features</h2> </div> <ul> <li>Public market data from <strong>five exchanges</strong> (no private API keys)</li> <li> <strong>50 tracked symbols</strong> — <strong>5 USD</strong> and <strong>45 USDT</strong> markets in Postgres (BNB is USDT-only on three venues; MKR is not tracked — Binance-only)</li> <li> <strong>Selective polling</strong> — backend fetches only markets you enable; toggling a chip updates the next cycle via <code>PUT /api/preferences/poll</code> (enable order preserved for Coinbase prioritization)</li> <li>Batched ticker fetches…</li> </ul></div> </div> <div class="gh-btn-container"><a class="gh-btn" href="https://github.com/schiessti-afk/CryptoArbitrageMonitor" rel="noopener noreferrer">View on GitHub</a></div> </div> opensource cryptocurrency java angular