High-frequency trading, or HFT, is automated trading taken to its physical limit: thousands of orders placed and cancelled every second, positions held for microseconds, edges so small they only make sense at enormous scale and speed. It is real, it makes up a large share of volume in major markets, and it is almost entirely out of reach for a retail forex trader. Understanding why is useful, mostly so you can recognise when someone is selling you a fantasy version of it.
What it is
HFT is a family of strategies — market making, arbitrage, order-flow prediction — that share one requirement: being faster than everyone else. The profit on any single trade is tiny, often a fraction of a pip. The firms make money by doing it millions of times a day with a high win rate and almost no holding period. Speed is not an advantage bolted onto the strategy; speed is the strategy. Whoever reacts first captures the price, and everyone else gets what is left.
The infrastructure
The speed comes from spending, and the numbers are not retail numbers:
- Co-location — renting rack space in the same data centre as the exchange's matching engine, so signals travel metres instead of miles.
- Direct market feeds — raw exchange data, not the consolidated feed a broker passes on.
- Specialised hardware — FPGA and custom chips that process an order in nanoseconds, because software on an ordinary processor is too slow.
- Microwave and laser links — networks that beat fibre-optic cable between financial centres, bought to shave off milliseconds.
Together this runs to hundreds of thousands, often millions, of pounds a year, plus the engineers to build it and defend it.
Why retail can't really do it
Now put a retail setup next to that. You run an EA on MT4 or MT5, on a PC or a cheap VPS, through a retail broker.
- The quotes you see are already old. By the time a price reaches your terminal it can be tens or hundreds of milliseconds stale. An HFT firm measures its edge in microseconds — roughly a thousand times smaller than the delay you begin with.
- Your broker sits in the middle. Retail orders are handled, sometimes internalised, and filled at the broker's pace rather than an exchange's.
- The platform was not built for it. MT4 was designed for discretionary and slow-automated trading, not nanosecond execution.
If a product is sold to retail as "HFT", the speed claim is marketing. The infrastructure that makes real HFT work costs more than most retail accounts hold and cannot be rented from a broker. What is actually on sale is usually a fast scalper — a different, and far more fragile, thing.
What retail "fast" trading actually is
The closest a retail trader gets is scalping — many small, short trades — or latency arbitrage, which tries to exploit a broker's slow feed using a faster one (see what is latency arbitrage). Brokers ban the latter the moment they spot it, because it profits at their expense, and accounts using it are quickly restricted or closed. It is a fragile edge that vanishes the instant the broker upgrades its pricing. The honest position is that retail cannot compete on speed, and should not build a strategy that depends on it.
The Karnek note
Retail speed strategies tend to fail quietly — a latency edge closes, or a scalper's costs overtake it — and the account bleeds a pip at a time. Karnek reads your live terminal and shows the real per-trade costs and drawdown, so a decaying fast strategy is visible early. It is read-only — it monitors the account and can never place a trade.
Written and reviewed by the Karnek Research team. Last updated August 2026.
Educational content only - not financial advice. Past performance does not predict future results. Trading carries significant risk.