Rebalance
Drawdown Stop
Pair TradeLadder InVol HarvestHow a sentence about your portfolio becomes an agent that can act on it
Roby Agentic
Accounts
An independent agent layer built on Robinhood Chain
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What a rule can name
An inflection point
In 2025 you watched the chart. In 2026 a sentence you wrote watches it for you.
Limits every session key carries. Scope, cap, and clock.
Keys, funds, or approvals that ever leave your custody.
Roby turns a sentence about your portfolio into an agent that can act on it — and never more than it.
An agentic account is not a bot with your password. You write the rule in plain English. Roby compiles it into a policy your wallet signs once: which markets it may touch, how much it may spend, and the hour it stops mattering.
From there the agent watches. When the condition you named is true it assembles the orders, checks them against the policy, and submits them on Robinhood Chain. When the condition is not true it does nothing, loudly, in a ledger you can read.
Nothing here is discretionary. The agent cannot widen its own scope, top up its own budget, or outlive its own key. Every capability it has, you handed it in a sentence.
Written in plain English
Compiled to a signed policy
If NVDA outruns AMD by twenty percent, close the pair and hold the proceeds in cash.
Plain sentences,
compiled
You already say it out loud: trim the winner, stop the bleeding, buy the dip in thirds. Roby parses that sentence into a typed condition and a typed action, then shows you the compiled form before you sign anything. If it cannot resolve a phrase, it refuses rather than guesses — an ambiguous rule is a rule that trades at random.
In this chapter, we’ll cover:
- The seven values a condition can reference
- Compiling English into a typed policy
- Why an ambiguous rule is rejected
- Dry-running a rule against history
- Amending a rule without re-signing everything
Authority with
an expiry date
The agent never holds your account. It holds a session key: a scoped, capped, expiring grant your wallet signs once. Scope names the markets it may touch. The cap names the most it may ever move. The clock names when the grant becomes worthless. Revoke it and the agent goes quiet mid-sentence.
In this chapter, we’ll cover:
- Session keys, scope, and spend caps
- One signature, many executions
- Revoking authority in a single transaction
- What the agent is structurally unable to do
- Custody that never changes hands
Every action,
on the record
An agent you cannot audit is an agent you cannot trust. Every evaluation writes a line: what it read, what it concluded, what it did, and which clause authorised it. Silence is a line too — the ledger records the times a rule looked and chose not to act, which is most of them.
In this chapter, we’ll cover:
- What gets written on every evaluation
- Reading a decision back to its clause
- Recording the times nothing happened
- Reconciling fills against the policy
- Exporting the ledger for your accountant
Strategy library
Seven rules. Seven shapes
of the same instinct.
Pair Trade
Close the spread when one leg runs away
“If NVDA outruns AMD by twenty percent, close the pair and hold the proceeds in cash.”
Open in the desk →
Rebalance
Hold the weights you meant to hold
“Rebalance NVDA and cash to sixty forty every Friday at the close.”
Open in the desk →
Drawdown Stop
Leave before the loss becomes a decision
“If AMD falls eight percent from its high, sell half the position.”
Open in the desk →
Ladder In
Buy the dip in thirds, not in panic
“When SPY is ten percent off its high, buy the dip in thirds.”
Open in the desk →
Volume Halt
Stop adding when the tape goes quiet
“If daily volume on NVDA falls under thirty million shares, stop adding.”
Open in the desk →
Price Trigger
A size and a level, and nothing else
“Buy $2,000 of NVDA when it trades below 180 dollars.”
Open in the desk →
Funding Signal
Let the perp market tell you when to trim
“If ETH funding goes above one basis point an hour, sell a quarter of my ETH.”
Open in the desk →
The ledger
The ledgerEvery check, on the record
A rule looks once a minute and writes a line either way. The line says what it read, what it concluded, and — when it acted — the transaction on Robinhood Chain that settled it. The silences are most of the ledger, and they are kept too.
Read what gets writtenRead the spec
& the rule grammar
What is listed, the seven values and seven actions, the session-key schema the vault verifies, and what the ledger records — generated from the tables the product runs on.
Open the specificationRoby is an independent project and is not affiliated with Robinhood Markets, Inc.
Specification
This account
runs on
Grant signature standard
Default key life
Guardrail types