Systematic · US markets · US dollars

Trend-following, run by rules, not hunches.

A99 Horizon (九优量化) runs systematic trend-following strategies in US-listed markets, in US dollars. Written rules decide when to hold and how much, checked once every trading day — no forecasts, no hunches.

Request an account How it works →

Clients see their own account — positions and P&L — read-only, updated after each US close. Requests are usually approved within one business day.

Hypothetical backtest · last 10 years

Model client account vs the S&P 500

CAGR

55.7%

SPY 15.3%

Sharpe

2.3

SPY 0.8

Max drawdown

−17.8%

SPY −33.7%

  • Model account, after costs, before profit share
  • S&P 500 (SPY, dividends reinvested)
$1$2$5$10$20$502017202020232026Growth of $1 (log scale)BACKTEST

Hypothetical: today's rules applied to past prices, with rules and assets chosen recently, with hindsight — not the results of any real account. Uses leverage (up to 2× margin and a 3× leveraged fund). After estimated trading costs and interest, before any profit share or advisory fees. Live trading at Interactive Brokers began in May 2026. Past and simulated results do not predict future results. Data through Oct 30, 2026.

More assumptions

Interest is paid on margin and earned on cash. About three-quarters of the account is set aside for the strategies and the rest is held back as a buffer that also backs the margin the positions use. One strategy trades a bitcoin ETF (listed January 2024); the backtest models it with the bitcoin price for the whole period. CAGR = growth per year; Sharpe over 3-month T-bills; max drawdown = the largest fall from a previous high. Registered users see every assumption and the year-by-year results — request an account.

Rules, not opinions

Every trade comes from written, tested rules.

Daily, not intraday

Signals use daily price bars, not intraday noise.

Tested across market periods

A rule must hold up across many periods, not just one.

Reconciled to the broker

Live results are checked against real fills and fees.

— 01 · What we do

A systematic trading business, built around one discipline.

We research rules that capture persistent market trends, test them across many market periods, and run them live — automatically, every trading day.

01

Research

We study how liquid markets trend and turn that behaviour into explicit rules — when to enter, how much to hold, when to leave.

02

Automated execution

Live systems run on a fixed schedule, place orders through established brokers and reconcile every fill.

03

Client accounts

The same system runs in accounts held in each client's own name, followed through a private, read-only portal.

— 02 · How the algorithm works

Ride the trend. Step aside when it breaks.

Many markets trend for long stretches. Our systems aim to hold during the strong stretches and step aside for the rest. Losses still happen: in testing, single strategies have fallen more than 50% from a high; the combined portfolio's falls were smaller, but real.

trend confirmed → in trend breaks → out in the market in cash in the market in the market in cash in the market trend confirmed → in trend breaks → out
Illustration only — not a real trade or a real result.

  1. Step 1

    Read the trend

    Once a day the system measures momentum and trend. Strong, persistent moves qualify; choppy noise does not.

  2. Step 2

    Size for risk

    Positions shrink when a market turns volatile and grow when it calms, so each one carries a similar amount of risk.

  3. Step 3

    Exit by rule

    Exits are decided by rule — a confirmed trend break or, where a strategy uses one, a stop. On a price gap, a stop can fill well below its level.

  4. Step 4

    Wait in cash

    When nothing qualifies, capital waits. Being out of the market is a position too — often the most important one.

— 03 · Risk first

Survival comes before return.

A strategy only compounds if it is still standing after the bad years. That is why the limits are part of the system itself, not an afterthought.

Five layers of risk control

The risk stack

  1. 01 SIGNALTrend and momentum, checked once a day on daily prices
  2. 02 SIZESmaller in volatile markets, larger in calm ones
  3. 03 SPREADSeveral systems, with a cap on each asset's share
  4. 04 EXITRule-based exits, with protective broker stops where a strategy uses them
  5. 05 BREAKERAn account-level circuit breaker that closes positions in a catastrophic move

— 04 · From idea to live

Nothing trades until it survives the process.

  1. 01

    Research

    A hypothesis, clean data and a full-history test.

  2. 02

    Validate

    Multi-period walk-forward tests — one good backtest is treated as noise.

  3. 03

    Review

    Every change to a live system is reviewed and tested before it touches capital.

  4. 04

    Live, small

    Real capital at test size, measured on real fills with commissions and slippage, reconciled daily.

  5. 05

    Scale

    Changes to the capital a strategy trades are decided in writing and reviewed before they take effect.

05 · For clients

Your account. Your view.

  • Start with the backtest — request an account; once approved (usually within one business day), see the model's 10-year results and every assumption.
  • An account of your own — held at a regulated broker.
  • The same system for every client — one codebase, one configuration, no hand-picked book.
  • A read-only portal — once your account is linked, see your own account's positions, assets and P&L, updated daily after the US close. Nothing can be traded from it.
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Let’s talk.

For a client account, a partnership or simply a research conversation — the door is open.

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