Coming soon
Automate your trading.Keep the keys.
Mercustos runs on your Mac and trades your own Robinhood agentic account, inside hard limits that no strategy, model or update can change.
Today’s activity
One order, from proposal to protected position.
- ETF mean reversion proposed an orderBuy 2 shares at a $21.40 limit.9:41:02 am
- Warden check passed$42.80 of your $50 position limit. $4.10 of $25 daily loss used. No unconfirmed orders.9:41:02 am
- Sent to RobinhoodLimit order, 2 shares at $21.40.9:41:03 am
- Filled2 shares at $21.38.9:41:05 am
- Protective stop resting at the brokerSells 2 shares if the price falls to $20.30, even while your Mac sleeps.9:41:06 am
- RecordedEvery step is saved to the journal on this Mac.9:41:06 am
Example order and values. You set your own limits.
Your Mac does the trading. We never see your account.
Mercustos is software you run, not a service that trades for you. The engine, the Warden, your strategies and every record stay on your machine. Our servers handle your license and updates, nothing else.
On your Mac
- The Mercustos engine and the Warden
- Your strategies, and any retraining you approve
- Journals of every decision, order and fill
- The live console, built from your broker's own reports
Your Robinhood sign-in stays in your Mac’s Keychain. Mercustos connects to your dedicated agentic account with your own login.
TradeWarden servers
What we receive
- Your license ID
- The app version you're running
What we never receive
- Broker sign-in or credentials
- Account numbers
- Holdings, orders or results
Rules that hold when you’re not watching.
Automation is only as trustworthy as the rules around it. These are built into the engine, not offered as settings a strategy can switch off.
Limits only you can move
Strategies, research and retraining can propose trades. None of them can send an order on its own or loosen a Warden limit.
Unknown means stop
If an order's outcome is unclear, Mercustos marks it unknown and holds new entries until it's reconciled with your broker.
An exit before every entry
No position opens without a protective exit ready. Where the instrument supports it, the stop rests at the broker, so a sleeping Mac doesn't leave you exposed.
A pause that stays paused
One switch stops new entries. A pause survives restarts and updates, and only you can lift it.
Only real numbers
The console shows what your broker reports. Strategy trials appear as labeled shadow results and are never blended with live ones.
A record of everything
Private journals keep every decision, order and fill on your Mac, so you can always see why something happened.
Proved on our account before it reaches yours.
Mercustos opens in stages, and each one has to earn the next.
Flat pricing, never a cut
Mercustos will be a flat monthly or annual subscription. We’ll never take a share of your profits or charge a percentage of your account. Pricing arrives with the private beta.
Stage 1: Prove it on our own accountNow
Before anyone else uses Mercustos, it has to run our own Robinhood account cleanly: limits held, every order reconciled, pause and exit drills recorded.
Stage 2: Private beta
A small group from this waitlist installs Mercustos on their own Macs. Read-only first; live trading starts only when each person switches it on.
Stage 3: Paid plans
Monthly plans open once the beta shows setup works for people other than us.
Stage 4: General release
Annual plans and open sign-up.
Get an invitation when the beta opens.
We’re inviting people in small groups. Join the waitlist and we’ll email you once, when it’s your turn.