QuantDev.ai — Open-source microstructure research labOpen-source alpha research for market microstructure. Private systems for serious deployment.https://quantdev.ai/en-usMemory in microstructure: how discrete events become a signalhttps://quantdev.ai/learn/memory-in-microstructure/https://quantdev.ai/learn/memory-in-microstructure/Raw order-book events are useless to a backtester until you build memory over them. A conceptual taxonomy of the four kinds of memory you can design — intrinsic clocks, asymmetric decay, multi-scale, and state-dependent.Wed, 01 Jul 2026 00:00:00 GMTmemorymicrostructurebacktestingorder-bookLocking the first three raw atomshttps://quantdev.ai/learn/locking-the-first-three-raw-atoms/https://quantdev.ai/learn/locking-the-first-three-raw-atoms/A 1,000,000-event evidence pass on four candidate raw microstructure atoms — what locked, what got dropped, and what survives into Stage 2.Sun, 17 May 2026 00:00:00 GMTraw atomsmicrostructureevidence passstage-1Four trade-aggression atoms — and three of them collapsedhttps://quantdev.ai/learn/trade-aggression-atoms-collapsed/https://quantdev.ai/learn/trade-aggression-atoms-collapsed/A 1,000,000-event evidence pass on four new trade-aggression atoms. Three of them turned out to be the same axis as raw_trade_ofi. One survived as a WATCH.Sun, 17 May 2026 00:00:00 GMTraw atomstrade flowevidence passstage-1Queue imbalance — the cleanest microstructure signal you can buildhttps://quantdev.ai/algos/queue-imbalance/https://quantdev.ai/algos/queue-imbalance/A careful walk through queue imbalance — what it is, why it works, how to implement it robustly, and where it breaks.Sun, 12 Apr 2026 00:00:00 GMTqueue-imbalanceorder-booksignalLatency isn't what you think it ishttps://quantdev.ai/learn/latency-isn-t-what-you-think/https://quantdev.ai/learn/latency-isn-t-what-you-think/Mean latency is the wrong number. A practical walk through tail latency, jitter, and the engineering that separates paper strategies from live P&L.Sun, 05 Apr 2026 00:00:00 GMTlatencyexecutionengineeringWhy your backtest lies to you (and how to make it stop)https://quantdev.ai/learn/backtest-lies/https://quantdev.ai/learn/backtest-lies/The eight ways a backtest quietly overstates P&L — with a checklist for catching each one before real money hits the exchange.Sat, 28 Mar 2026 00:00:00 GMTbacktestingresearchdisciplineGetting started with QuantDev.aihttps://quantdev.ai/learn/getting-started/https://quantdev.ai/learn/getting-started/How this site is organized, what to read first, and how to use it if you're serious about building trading systems.Tue, 10 Mar 2026 00:00:00 GMTstartquanteducationMarket microstructure, explained like you'll build something with ithttps://quantdev.ai/learn/market-microstructure-basics/https://quantdev.ai/learn/market-microstructure-basics/A first-principles tour of order books, queues, price formation, and the execution reality hiding underneath every candlestick.Tue, 10 Mar 2026 00:00:00 GMTmicrostructureorder-bookexecutionAn MBO research framework for serious signal workhttps://quantdev.ai/algos/mbo/https://quantdev.ai/algos/mbo/A structured approach to researching alpha from market-by-order data — from raw messages to a defensible, cost-aware backtest.Tue, 10 Mar 2026 00:00:00 GMTmbomicrostructureresearchOrder Flow Imbalance — the signal everyone gets halfway righthttps://quantdev.ai/algos/ofi/https://quantdev.ai/algos/ofi/A careful, annotated walk through OFI, MOFI, and queue-imbalance variants — including the mistakes that make them look better than they are.Tue, 10 Mar 2026 00:00:00 GMTofiorder-flowalpha