Can you point a trading bot or an AI agent at a prop firm account? The only honest answer is: it depends on that firm’s written rules, and firms disagree with each other and revise their terms. This is deliberately not an evasion guide. Nothing here helps you get around a rule, and a guardrailed bridge is the opposite of a workaround: it is a way to hold your automation inside a limit, not slip past one. The useful work is knowing where your firm’s policy lives, reading it in the firm’s own words, and turning the parts you have verified into limits your software actually enforces.
The rules are written down. Start there.
Every serious prop firm publishes its automation stance somewhere in its rulebook, terms of service, or FAQ. That is the source of truth, not a forum thread, not a summary page like this one, and not the homepage that says trade your way. The clause that governs you is usually three levels down, and the definitions section next to it is where the real scope sits. Read both in full.
Two structural facts make this a per-firm job rather than a lookup. First, firms define the same words differently: what one treats as ordinary assisted trading, another classes as prohibited automation. Second, the rules commonly differ between an evaluation account and a funded account at the same firm, and they change when platforms or account products change. A screenshot of a rule from last quarter is not evidence of the rule today. If you are still at the stage of asking whether automation is permitted at all, the companion piece on which futures prop firms allow automated trading covers the spectrum and how to place your own setup on it. This piece assumes you are reading a specific firm’s policy and want to comply with it.
Where the policy is silent or ambiguous, and for an AI agent it very often is, because most rulebooks predate agent workflows, do not read silence as permission. Email support and ask a specific question: how do you classify an agent that proposes orders through a tool but does not auto-execute, and does it fall in your automated bucket or your assisted one. Keep the dated reply. A written answer from the firm outranks any third-party summary.
Reading the policy: the words that carry weight
Automation policies lean on a small vocabulary, and each term is a switch that decides whether a clause applies to you. Map your own setup against these before you conclude that “automation allowed” settles anything. Every definition below is general on purpose: read the exact meaning off your own firm’s rulebook, because the boundaries move between firms.
- Automated, algorithmic, EA, bot. The umbrella terms for unattended logic that submits orders with no human per order. This is the category most often restricted, and the one to verify most explicitly.
- Semi-automated, assisted, one-click. Software proposes, a human approves each order. Some firms carve this out where a fully hands-off system is barred, but the carve-out is specific: read whether a confirm click counts, or whether they require you to actively monitor and adjust.
- AI agent. An agent that reads state and proposes orders through tools. Most policies do not name it. Get its classification in writing rather than assuming it inherits the assisted rule.
- Copy, mirror, trade-copier. Replicating fills across accounts. Copying your own accounts and copying someone else’s are usually treated very differently, and account-count caps interact here.
- High-frequency, latency, VPS. Some firms ban latency-sensitive or high-frequency patterns and restrict running your automation on a VPS. These are easy clauses to overlook.
- Prohibited strategies (grid, martingale, DCA, hedging). Independent of automation, some firms ban specific strategy shapes. A bot that runs one of these can fail on the strategy rule even where automation itself is fine.
- Consistency, minimum trading days. Rules about how evenly profit is distributed and how many days you must trade. A bot that has one outsized day can breach consistency while net profitable.
- Third-party software or tools. Some policies name or exclude specific external tools and bridges. Check whether third-party order routing is addressed at all.
The challenge is where the rules bite hardest
The evaluation, the challenge, is exactly where the temptation to automate is strongest and where the rules bite hardest. It is a fixed, measurable set of constraints (a profit target, a daily loss limit, a trailing drawdown, often a consistency rule and a minimum number of trading days), and it is emotionally the easiest phase to want to hand to a machine. It is also the phase where an automated account trips most, because a bot does not feel a daily loss limit approaching the way a person does, and a consistency or minimum-days rule punishes exactly the burst behavior automation makes easy.
None of that changes the compliance stance. An automated evaluation is still your evaluation, and the firm’s rules apply to it the same as to a manual one. Automating the challenge is not a way to beat the challenge, and any content that frames it that way is selling you risk. The responsible version is narrow: if your firm permits automation on the evaluation, use hard local limits to keep the automation inside the same numbers a careful manual trader would respect, precisely because an out-of-bounds order during an evaluation is expensive and unrecoverable.
What a guardrailed bridge can and cannot do
Be exact about the boundary here, because it is where most confusion lives. PitBridge does not know your firm’s rules, cannot read your firm’s policy, and cannot make you compliant. It holds no certification from any firm. What it does is enforce the numeric limits you enter, and keep a local record of what happened. That is a software control over your own configuration, not a statement about your account status.
Three limits worth enforcing locally
Some prop constraints reduce cleanly to a check at the moment an order is placed. Those are the ones software can hold for you. Three carry most of the weight, and each maps to a limit the agent or script on the other end cannot weaken, because limits load from a config file the caller cannot rewrite and the release controls are operator-only on the CLI.
The maximum position is the ceiling on how much you can hold. PitBridge splits it into a per-order cap and a net-position cap, so a bot cannot slip past by scaling in with many small orders. The daily loss limit halts new entries once the day’s profit and loss reaches your number, and it can latch so the day stays closed rather than reopening on a small recovery. The kill switch is the blunt instrument for everything a rule cannot anticipate: engage it and no new order passes, full stop, released only from the command line.
[accounts.eval.guardrails] max_contracts_per_order = 2 # no single order larger than this max_position = 4 # net position cap across all orders daily_loss_halt = 750 # halt new entries once day P&L hits -$750
Limits you set from rules you verified with your firm. The numbers are yours, not any firm’s policy. Leave a key out and that check does not run.
The kill switch lives outside the config because it is a manual act, not a threshold: you engage it when a news window opens, when you are done for the day, or when something looks wrong, and only you can release it.
$ pitbridge kill --reason "news window, standing down" # kill switch engaged. every new order is refused until released. $ pitbridge unkill # released. CLI-only: no agent tool and no REST route can lift it.
The kill switch is evaluated first, before every other check, and its release is off the agent surface by design.
When an order breaks one of these, the engine refuses it before NinjaTrader sees anything and returns a typed reason code, so the block is a fact you can read rather than a mystery. An oversized order comes back BLOCKED reason_code=MAX_CONTRACTS_PER_ORDER; a loss past your number comes back DAILY_LOSS_HALT. The guardrails page lists every rule and its reason code, and the prop firm compliance pillar maps common prop constraints to the guardrail that enforces each.
Your audit log is a record, not a certificate
Every request, decision, and outcome is written to an append-only, hash-chained audit log on your machine. pitbridge audit why <order_id> explains any single order after the fact, and pitbridge audit verify proves the log has not been edited or truncated. If a firm ever asks what your automation did, that record lets you show exactly what was proposed and what was allowed or blocked, and why.
Be clear about what this is. It is evidence of what happened, not a certificate of compliance, and it does not speak for the firm’s own view of your account. Pair it with the paper trail on the rules side: a dated screenshot of the policy page, the support ticket for any written clarification, and the URL of the rule itself. Together they let you reconstruct what you were told and what your automation actually did.
- Have you read the firm's current written automation policy, including the definitions section, for this account type?
- Have you a dated written answer from support for anything the rulebook leaves silent or vague?
- Have you translated each numeric rule you verified into a specific guardrail value, and left nothing to memory?
- Is the daily loss halt set to a number at or inside your firm's daily loss limit?
- Are the per-order and net-position caps set so scaling in cannot breach the position rule?
- Have you placed a deliberately out-of-bounds order in paper and confirmed it is blocked with the reason code you expected?
- Do you know how to engage the kill switch, and is the audit log where you can retrieve it?
Automating on a prop account, when your firm permits it, is a good use of hard local limits, precisely because an out-of-bounds order is expensive. But those limits are only as correct as the rules you fed them, the rules are the firm’s to set and change, and staying inside them is your responsibility, not the software’s. Read the policy, verify the ambiguous parts in writing, enforce the numbers locally, and keep the record. Tell us your firm and platform on the waitlist. PitBridge is trading infrastructure, not financial advice: it enforces the limits you configure, makes no promise about passing an evaluation or keeping an account, and does not know or bypass any firm’s rules. Futures trading carries a substantial risk of loss.