dhansetu.tech / hft
HFT Visualized
You can read about HFT anywhere. Here you see the real machine wired together — one tick traced from the exchange to the ack, fully animated and verified end to end. Watch it run, free:
Full picture — every process, its modules, and how data routes
orders 0/sPnL 0market dataordersfills / post-traderisk / margin / busThe whole system at once. Step through to follow one tick from the exchange all the way to a fill — and the control paths around it.
↓ two machines — the HFT system and the exchange
open it
The market, fully animated
Three separate worlds, each colour-coded below: the HFT system a trading firm runs, the stock exchange that matches it, and the crypto exchange — plus the magic behind crypto itself. Each opens on its own page.
The HFT system
the trading-firm sideHow a trading firm races one tick from the exchange into a trade.
The live engine
Boot the machine and trace one real tick from the exchange to the ack — step, scrub and zoom every stage.
Start the engine →The component book
Every component documented with worked examples, live animations and interview / exchange Q&A.
Open the book →Order book builder
The hot path, structure by structure: bitmask price index, record pool and the lock-free snapshot.
Open the design →Stock exchange
newthe venue side · NSE-styleHow the exchange itself matches every order, in microseconds — the engine, not the broker.
Matching engine, animated
Follow one member order through validation, the sequencer and the matching engine to a trade — disseminated to the whole market. Free to watch.
Watch it →The exchange book
Order entry, the matching engine, order types, auctions, market data, clearing & settlement, surveillance & circuit breakers, co-location and smart order routing — with interview Q&A.
Open the book →Crypto exchange
newthe venue side · 24/7How a crypto exchange matches off-chain and moves money on-chain — plus, kept separate, the fundamentals: why crypto actually works.
Crypto matching engine
Follow one order, a deposit and a withdrawal — off-chain matching, custodial settlement, hot/cold wallets — and how it does maintenance without ever closing. Free.
Watch it →The crypto-exchange book
Off-chain matching, custody & settlement, wallets, perps (funding & liquidation), liquidity & fees, 24/7 ops, and CEX-vs-DEX security — with interview Q&A.
Open the book →Magic behind crypto
Kept separate from the exchange: why virtual money works, what a blockchain is, hashing, mining & proof of work, consensus, keys & wallets — with a live mining animation.
Discover →go deeper
You've got three ways in. Now go deeper.
Start with the three walkthroughs above. The deeper machine — strategy, risk, silicon, concurrency and options — goes further, and unlocks with membership.
At a given price, queue position is everything. Two firms quoting the same price are not equal — the one whose order reached the matching engine a microsecond sooner sits ahead in the queue and trades first. That single rule is why a firm spends millions shaving nanoseconds. Inside, you see exactly how that race is won — the kernel-bypass feed, the lock-free book, the pinned cores and the order's round trip — all animated.
How a strategy reads the book, decides to trade, and slices a parent order without moving the price.
Unlock with membership →The pre-trade gate and scenario-based portfolio margin every single order clears in microseconds.
Unlock with membership →Silicon vs software latency, stage by stage, and the full tick-to-trade time budget.
Unlock with membership →CPU pinning, false sharing, lock-free queues and the worker pool that runs thousands of strategies.
Unlock with membership →NIC bypass, busy-poll, multicast feed handling and zero-copy on the wire.
Unlock with membership →Implied vol, the Greeks, and the analytics that drive live quoting and risk.
Unlock with membership →what you'll learn
How high-frequency trading actually works — end to end
HFT Visualized is an interactive, fully-animated walkthrough of a real high-frequency trading system: from the exchange's matching engine and market-data feed, through the order book, strategy engine, pre-trade risk and SPAN margin, to the gateway and an order's round trip back to the exchange. Not slides and boxes — a live machine you can step, scrub and zoom into, with the real data structures and latency techniques exposed under every stage.
Market data & the order book
How tick-by-tick (TBT), market-by-price (MBP) and level-1/2 feeds are multicast from the exchange, and how a lock-free, bitmask-indexed order book is rebuilt from them on every single message.
Strategy, risk & SPAN margin
How a strategy reads the book and decides to trade, and how every order clears pre-trade risk checks and SPAN scenario-based margin in a few microseconds before it ever reaches the wire.
Latency — software vs FPGA
Kernel bypass, busy-polling, CPU pinning, NUMA, cache lines and false sharing — where the nanoseconds actually go in the tick-to-trade path, in both software and silicon.
Who it's for
- ✓Engineers targeting a high-frequency-trading or low-latency desk
- ✓Students preparing for HFT or exchange (NSE / MCX) interviews
- ✓Quant developers who want the whole machine to finally click into place
- ✓Anyone who has read about HFT for years but never watched it run
What you'll be able to do
Explain, end to end and with genuine confidence, how a tick becomes a trade: how market data is decoded with kernel bypass, how the order book is updated with no locks or allocation on the hot path, how thousands of strategies run on a pinned worker pool, and how an order clears risk and reaches the matching engine first. Desk-ready and interview-ready — not memorised buzzwords.
Open the component book →the usp
Watch a tick become a trade
Most courses describe HFT. This one runs it — a live, animated pipeline from the exchange feed to the fill, with the real data structures and latency tricks exposed under every stage.
Tick-by-tick market data is multicast from the matching engine — millions of messages a second.
why this exists
Information is everywhere. Understanding isn't.
You've done the research — articles, papers, threads. You have the vocabulary: order book, feed handler, SPAN, colocation. And after all those hours, the real question is still unanswered: how is the whole machine actually wired together?
How does a single tick travel from the exchange, through the book, the strategy and risk, and come back as an acknowledgement — in microseconds? How do thousands of strategies run inside one engine without melting it down? The internet hands you facts. It never shows you the wiring.
That is the gap this closes. Every component is traced end to end and verified against a real production system — you watch a tick-by-tick tick start at the exchange and follow it, animated, all the way to the ack landing back at your strategy. The data structures are the real ones. The latency tricks are the real ones. The wiring is the real wiring.
If you're serious about breaking into HFT, this is where it finally clicks — and you walk into the interview, or onto the desk, with genuine confidence instead of memorised buzzwords.
Everywhere else
- ✕Boxes-and-arrows diagrams with no real wiring
- ✕“A strategy is a thread” and other half-truths
- ✕Vague latency claims, no data structures
- ✕Toy or dummy architectures that fall apart on questions
- ✕You memorise terms — and freeze when probed
Here
- ✓One real tick traced exchange → book → strategy → risk → gateway → ack
- ✓Thousands of strategies on a pinned worker pool — objects, not threads
- ✓The actual structures: bitmask order index, pre-allocated pool, lock-free snapshot
- ✓Verified against a real production system, not invented for a slide
- ✓You understand the machine — and answer with confidence
Promoter & Investor
Alok Chaturvedi
Promoter & Investor
MBA · highlighted
IIM Kozhikode
Finance & Strategy
Business & product leader · Capital markets & WealthTech
16+ years in capital markets and fintech, 10+ in senior leadership — having built and scaled mobile-first stock-broking, mutual-fund, MTF, derivatives and algo-trading products and businesses, owning P&L, GTM, growth, distribution and compliance. Today an investor and mentor, building in WealthTech.
Built & led at
Education & credentials
Your instructor
Ashutosh Pandey
C++ ArchitectHFTLow-Latency & HPCCapital Markets
Architect and owner of Dhansetu's end-to-end quant trading platform. 15+ years designing and building low-latency, multi-threaded backend systems on Linux and Windows for capital markets — HFT market-data pipelines, order books and backtesting engines in C++17/20, Python and PostgreSQL, with a relentless focus on latency, throughput and binary-data efficiency. These lessons distill the systems I build and the questions I have been asked across 200+ interviews.
Where I've built
Low-latency programming
Certifications: C-DAC (Centre for Development of Advanced Computing) · NISM
get in
Learn the machine, end to end
Full access
The complete, verified end-to-end walkthrough — the live engine, the component book and the order-book low-level design, plus everything added next.
- ✓One real tick, exchange → ack, fully animated
- ✓The real data structures and latency tricks
- ✓Built for interview and desk-ready confidence
1:1 with the engineer
Hourly sessions
Want it tailored to you? Book a live hour with the engineer who built this — bring your questions, your interview prep, or your own design, and get straight, verified answers.
- ✓A personalised, end-to-end deep dive
- ✓Interview and HFT-desk preparation
- ✓Review your own architecture or code
Not sure yet? Request a walkthrough →
questions
Straight answers
How does high-frequency trading actually work?+
A high-frequency trading system consumes the exchange's market-data feed, rebuilds the order book in microseconds, runs strategies that react to it, clears every order through pre-trade risk and SPAN margin, and sends orders back to the matching engine — all racing to be first in the queue. HFT Visualized animates that entire path: one real tick traced from the exchange to the acknowledgement, end to end.
What is an order book, and how is it built in an HFT system?+
The order book is the live list of resting buy and sell orders at each price. An HFT engine rebuilds it from the tick-by-tick feed using a bitmask-indexed id→record map, a pre-allocated record pool and price-level ladders — updated incrementally on every message with no locks or allocation on the hot path. The order-book low-level design page walks each structure, step by step.
How do I prepare for an HFT or exchange (NSE / MCX) interview?+
You need to explain, end to end, how a tick becomes a trade: market data and feeds, the order book, matching and price-time priority, pre-trade risk, SPAN margin, latency techniques (kernel bypass, CPU pinning, false sharing) and an order's lifecycle. Every component here carries an interview-prep Q&A covering exactly those questions, including India-market specifics like SPAN, price bands, freeze quantity and the contract master.
Why pay when HFT information is free online?+
Information is free; understanding how it is wired together is not. Elsewhere you get scattered facts and boxes-and-arrows diagrams. Here you trace one real tick end to end — exchange feed to the ack — verified against a production system, so the whole machine finally clicks instead of staying a pile of terms.
Is this the real architecture or a simplified toy?+
The architecture, the data structures (bitmask order index, lock-free book, pre-allocated pool, pinned worker pool) and the latency techniques are the real ones from a production HFT system, generalised to vendor-neutral terms — not invented for a slide.
Will it actually help me break into HFT?+
It is built for interview and desk-readiness. You will be able to explain, end to end, how a tick becomes a trade, how the order book is updated with no locks, and how thousands of strategies run in one engine — with genuine confidence rather than memorised buzzwords.
Do I need a trading background?+
No. It starts at the exchange tick and builds up one component at a time, and the animations carry the intuition. If you can read code, you can follow it.
What is the 1:1 session?+
An hourly live call with the engineer who built this. Bring your questions, your interview prep, or your own architecture and code for a review, and get straight, verified answers tailored to you.
Can I cancel?+
Yes — it is a simple monthly subscription. Cancel anytime; you keep access for the period you have paid for.