Nebula · Windows and Mac · MT4 and MT5

Build, test and deploy EAs without code. Start free.

You choose the market, the rules and the risk. Nebula builds, retests on data it never saw, grades and deploys.

Download free for Windows Email me the download linkSee plans
  • No code
  • Your rules
  • Tested on data it never saw
  • Windows and Mac
Free, today

Your first real deploy costs nothing.

Free includes one real deploy to MT5, one system, once.

01 Pick a pair, set your limits. Choose the market, the timeframe and your loss limits.
Zoom · Run ticket
Close up of the run ticket: instrument, timeframe, search size, risk per trade, max drawdown and the Launch Test button.
02 Retested on data it never saw. In sample, out of sample, then a sealed blind window.
Zoom · Test windows
Close up of the equity chart legend: in sample, out of sample and blind.
03 Read each grade.
Zoom · Grades
Close up of the Deploy list at 1x: the grade, checks and score of each system, A minus at the top.
04 Choose one for MT5. Pick a system, then Deploy to MT5. Free deploys one, once.
Zoom · Ready to deploy
Close up of the Ready bar: the Deploy to MT5 button.

Simulated.

What Free includes ›
Watch

Your first deploy, start to finish.

Install Nebula, run a test and put one system on an MT5 chart, on the free plan.

Blind test results

Every grade, tested on price the engine never saw.

Each one tested on the most recent 15% of its price history, kept sealed while the engine searched, graded and tuned.

304,705 systems tested on price they never saw

Grade A, the top grade, is rare: 2,235 of 304,705 systems, about 1 in 136.

Modelled on unseen dataNot liveNot a forecast

Search grade: the letter of a system's search score, A is 75 or more. Held up: profit factor above 1 on the sealed window. Polaris network results, 22 Sep 2026, not your account.

See the full table
Sealed window: the most recent 15% of each price history, never seen while systems were searched, graded or tuned.
Search gradeHeld upSystemsMedian profit factor
A68.9%2,2351.23
B48.1%23,9310.98
C46.4%142,6630.97
D42.8%129,9130.93
F38.7%5,9630.89
All systems45.0%304,7050.95
After the deploy

Nebula keeps watching after the deploy.

Nebula Mission Control tracking a demo book live: the corridor it must stay inside, its drift checks, its equity, and the Pause, Close, Replace and Remove controls.
01Starter and up

Live tracking and drift alerts

Mission Control sets each live system against the range its test modelled, and tells you when one drifts. Pause, resume or close it.

Mission Control acting on one leg of a demo book: Replace this leg proves an archived reserve on recent price, and you review the proof before anything swaps.
02Starter and up

It proves a replacement first

Pick a slipping system and Nebula retests reserves from your library on recent price. If none holds up, nothing changes.

Nebula Mission Control, the swap overlay: Meridian is being replaced by Meridian II on GBPJPY H4. The replacement is validated and the open trades are closed, the new strategy is being re-baked, then it recompiles, restarts MetaTrader and the new system goes live.
03Ultimate

Ultimate can replace it for you

It swaps in a tested replacement when a system stops behaving like its test. It reacts to results, not a timer.

Telegram on an iPhone: Orion, the Nebula bot, is back on the desk. 1 system live on USDJPY, 709 genomes and 5 portfolios in the vault, the search idle, and the questions it answers.
04Pro and up

Your desk on your phone

Connect your own Telegram for alerts and questions about your systems. Replies come from your computer, so keep it on.

Your EAs trade inside MetaTrader, so keep it running on your computer or a VPS.

Inside a test

One test, start to finish.

Six chapters on one screen. Scroll, or pick a chapter.Six chapters, each on its own screen.

The New Test DNA step: strategy families with ICT, SMC and Wyckoff ticked.

Simulated.

Simulated.

Simulated.

Simulated.

Simulated.

  1. 01Ultimate

    Pick the schools it builds from, such as ICT, SMC and Wyckoff.

    Zoom · Strategy families
    Close up of the DNA step: strategy families with ICT, SMC and Wyckoff ticked, and the ICT blocks listed.
  2. 02

    Pick a prop firm preset and the drawdown and daily loss limits fill in. It never promises a pass.

    Zoom · Preset and enforce
    Close up of the prop firm preset set to FTMO, with enforce prop firm limits ticked.
  3. 03

    Candidate systems are built and judged in front of you, and the count of systems found climbs.

    Zoom · Print bay
    Print bay clip
  4. 04

    Each system shows its in sample, out of sample and blind windows on one chart.

    Zoom · Test windows
    Close up of the equity chart split into in sample, out of sample and blind windows.
    Zoom · Test windows
    Close up of the equity chart at 1x: the out of sample window at 3.7% and then the sealed blind window at 4.1%.
  5. 05

    Tick any survivor to lay its curve over the rest.

  6. 06

    Click through your systems and choose which one goes to MetaTrader.

    Zoom · Grades
    Close up of the Deploy list: the grade, checks, score, market and tier of each system, A minus at the top.
    Zoom · Grades
    Close up of the Deploy list at 1x: the grade, checks and score of each system, A minus at the top.

Try it on your own market.

Download free for Windows Email me the download linkSee plans

Free includes one real deploy to MT5, one system, once.

Every feature

Everything Nebula does, on real screens.

Pick a feature. Every screen is the app as it ships today.

New Test, advanced settings: the spread in pips and the pip value.
The Autonomous mode screen with its goal cards.
Settings: pairing Telegram for phone alerts and control.
Telegram on an iPhone: Orion, the Nebula bot, is back on the desk. 1 system live on USDJPY, 709 genomes and 5 portfolios in the vault, the search idle, and the questions it answers.Telegram on an iPhone: the Nebula bot's command menu, from status and profit and loss to starting, pausing or stopping a search, grades and market data.

Search sixteen strategy schools

From ICT and SMC to Wyckoff. Up to 4,000 candidates a generation, on every plan.

Watch: choose the strategy families ›

Set the rules a system must pass

Mark a criterion Must pass and anything that misses it is dropped from your board.

Test one pair or many

Pick a style and add pairs. They run one after another.

Trained, tested, then sealed

Every system is checked on a window of price it never saw during the search.

Spread in every test

Set the spread your tests use. Commission and slippage are modelled by the engine.

Graded A to F

Every survivor gets a grade for the quality of its validation.

Open any system

Its windows, its trades and its rules, in one place.

Prop firm limits, built in

Load a firm's loss and drawdown rules into the EA. It never promises a pass.

Step aside for big news

Your EA can avoid high impact news and choose what happens to open trades.

One click to MetaTrader

Send a system to MT4 or MT5 as a ready EA.

Watch a test run live

Switch between the test window and Nebula Mode while it runs.

The Polaris network

Every Nebula that shares adds its anonymised backtests. Pro and Ultimate also download the pool.

Autonomous mode

Set a goal and a time budget. It searches, tests and grades, then reports what it found.

Combine systems into a book

Nebula builds a book from systems that trade differently and tests them together on the same days.

Find systems that cover each other

The Nebula shows which systems earn on each other's bad days.

Replay prop firm limits

See how often a book would hit a firm's limits across 1,000 replays at each risk level. It never promises a pass.

Twenty languages

Switch the whole app to your language in Settings. Twenty to choose from.

Watch: change the language in seconds ›

Alerts and control on your phone

Pair Telegram for alerts and remote control. Pro and Ultimate.

Find
Prove
Deploy
Watch and automate
Books
Everywhere

Start with one free deploy.

Download free for Windows Email me the download linkSee plans
Polaris · the shared network

Millions of tests. One network.

Every Nebula that shares adds its anonymised backtests. Pro and Ultimate also download the pool.

  • Anonymised backtests
  • Off in one click
  • Performance data only with consent
Zoom · One switch
Close up of Settings, Collection: the Shared network switch for Polaris, turned on.
Zoom · One switch
Close up of Settings, Collection: the Shared network switch for Polaris, turned on.
  • Anonymised backtests
  • Off in one click
  • Performance data only with consent
Your risk

Your limits are built into the EA.

Position caps, drawdown limits and your news rule are compiled into the EA itself. If a system cannot run faithfully on MT4, Nebula refuses the MT4 deploy.

Pro and Ultimate

Prop firm mode

Load a firm's daily loss and drawdown rules into the EA. Testing replays breaches first. It never promises a pass.

Zoom · Risk and limits
Close up of the Risk step after choosing FTMO: risk per trade 0.5%, max total drawdown 10%, max daily loss 5%, and enforce prop firm limits ticked.
Zoom · Max total drawdown
Close up of the Risk step after choosing FTMO: max total drawdown 10%.
Zoom · Max daily loss
Close up of the Risk step after choosing FTMO: max daily loss 5%.

Code: the Risk Guard inputs of one Systems Library EA, which keeps its own limits.

Code: the Risk Guard inputs of one Systems Library EA, which keeps its own limits.

Watch

See your chance of reaching a target.

Enter the challenge rules and Nebula replays the history at each risk level. Pro and up.

Plans

Pick by deploys and what happens after.

Search and tests are the same on every plan.

Starter

£29a month
First month £21.75
£449once
Lifetime licence
  • 1 real deploy a day, MT4 and MT5
  • Live tracking and drift alerts
  • Swap systems by hand
Choose StarterChoose Starter
Then £29 a month until you cancel. Cancel any time.
One payment. Never expires.

Pro

Recommended
£59a month
First month £44.25
£899once
Lifetime licence
  • Unlimited deploys
  • Portfolios and prop firm mode
  • Alerts and control on your phone
Choose ProChoose Pro
Then £59 a month until you cancel. Cancel any time.
One payment. Never expires.

Ultimate

£119a month
First month £89.25
£1,799once
Lifetime licence
  • Autonomous mode (beta)
  • Replaces drifting systems for you
  • Choose strategy families
Choose UltimateChoose Ultimate
Then £119 a month until you cancel. Cancel any time.
One payment. Never expires.
Free£0The same search and tests. Free includes one real deploy to MT5, one system, once.
Download free Email me the download link
Nebula reviews on Trustpilot · 3+ years running · Read every review
14 day cooling off before you download or activate. Refund policy
Compare every feature ›
Autonomous mode · Ultimate ·Beta

Set a goal and a time budget. Nebula searches.

It searches, tests and grades until the goal is met or the time runs out, then reports what it found.

Anything that touches a live account waits for your sign off.

See Ultimate
The Autonomous mode screen: a goal box and four goal cards, Grow the library, Look after what I have, Study and compare, Run the board.

Anything that touches a live account waits for your sign off.

See Ultimate
One engine

Free gets the same search and tests as Ultimate.

Paid plans add deploys, MT4 and live tracking. Pro and Ultimate add your phone.

CheckFreeStarterProUltimate
Search depthSameSameSameSame
Data windowsSameSameSameSame
Overfitting checksSameSameSameSame
Broker costs modelledSameSameSameSame
Same on Free, Starter, Pro and Ultimate
  • Search depth
  • Data windows
  • Overfitting checks
  • Broker costs modelled
Read this first

Straight answers before you pay

Not a signal service.

You choose the market, the rules and the limits. Nebula builds and tests what you ask for. It sends no signals.

No promised results.

Test results are simulated. Live trading can do worse than any test.

It cannot make a weak edge strong.

A run can end with nothing worth deploying.

Your computer has to stay on.

Your EAs run inside MetaTrader, so it must be running for them to trade. A VPS keeps it running when your computer is off.

Buying an EA or building one.

A bought EA comes with someone else's rules and someone else's test. Nebula shows you the rules and how yours was tested. Want a starting point? The Systems Library has 76 ready made systems.

MT4 or MT5.

Both on paid plans. Free deploys to MT5. If a system cannot run faithfully on MT4, Nebula refuses the MT4 deploy.

If you cancel.

You keep access to the end of the period you paid for. Then you drop to the highest lifetime plan you own, or to Free. Your vault stays yours, and EAs already in MetaTrader keep running.

What you need

Runs on your own computer

  • Windows 10 or 11, 64 bit
  • macOS 11 or later on Apple Silicon, or 10.15 or later on Intel
  • MetaTrader 4 or 5 and any broker
  • A VPS is optional
With every copy
01
Twenty languages.Switch the whole app in Settings.
02
Updates itself.New versions install when you open it.
03
The community strategy library.Browse it. Import and share on Pro and Ultimate.
Zoom · Twenty languages
Close up of Settings, Language: twenty languages from English, Español and Français to Tiếng Việt and Thai.

Scroll the zoom sideways for all twenty.

Ross Hayes, founder of Orion RFX
Who builds it

Built in the UK by Ross Hayes.

Engineer first. Trader by necessity.

“Nebula is unlike anything I've ever used or seen. It's not just a producer of EAs. It builds every one with your input and parameters.”
Finn · on Trustpilot · Aug 2026Nebula reviews on Trustpilot ›
FAQ

Common questions

Do I need to code?

No. You choose the market, the rules and the risk. Nebula writes the EA.

What does Free include?

The same search and tests as paid plans, one pair per run. Free includes one real deploy to MT5, one system, once.

How does the forward check work?

Each system you keep is retested on price that arrived after it was built. It ends as Profited, Lost, Breached, Too early or No trades, and Nebula scores how often its grades called it. It is simulated on your own data, not live trading.

Does it work on Mac, and with MT4?

Nebula runs on Windows and Mac. On Windows, paid plans deploy to MT4 and MT5 and Free deploys to MT5. On a Mac, Nebula connects to MT5 only.

What is the cooling off?

14 days, and it ends when you download the installer or activate a key. After that there are no refunds. See the refund policy.

Is my data shared?

Anonymised strategy research data goes to a shared research pool by default, and you can switch it off. Performance results are shared only with your consent.

How do I activate a key?

Click NebKey in the bottom bar of Nebula, choose Nebula licence and paste your code. You can also use Settings, Licence & System, Redeem NebKey. Find your code at orionrfx.com/activate.

White label

Your brand. Our engine.

Put your name on the whole app.

White label: register interest ›

Harbour Quant is an example brand, not a real company.

Test your own market. Deploy one system free.

Download free for Windows Email me the download link
Capital at risk. Nebula is a tool, not financial advice.
Free includes one real deploy to MT5, one system, once. Paid plans from £29 a month.
On a Mac? Download free for Mac ›

See pricing › Or browse the ready made Systems Library ›

Download Nebula free · What Nebula does · Funded and prop firm traders · Free trading tools · Reviews · Discord · YouTube · About · Contact

  • Free tier, no card: build, test and make one real deploy before you pay anything
  • Runs on your own PC or Mac: your MT4/MT5 account stays with your broker
  • 14-day cooling-off on any purchase before activation, in line with UK consumer law
  • A real person answers: Ross, the founder, via contact or Discord
  • Real reviews · Nebula on Trustpilot

Reviews on Trustpilot: Nebula & tools (Orion RFX) · private mentoring (Pip Surfing Society)