Automated traders face an extra filter when choosing a prop firm: does it actually allow your bot, and under what conditions? “EAs allowed” on a homepage rarely tells the full story. This guide explains what to verify before you run an expert advisor or algo on an evaluation.

Educational content only, not financial advice. Automated-trading rules vary and change — confirm on the firm’s official website.

”EAs allowed” is not a yes/no

Most firms fall into one of three buckets:

  1. Allowed — standard EAs are fine, sometimes with a note about prohibited exploit types.
  2. Allowed with conditions — EAs permitted, but specific strategies (HFT, arbitrage, tick scalping) banned.
  3. Restricted or banned — automated trading not permitted, or only on certain account types.

The label on the marketing page is step one; the rulebook is where the real answer lives.

Strategies firms commonly ban

Even “EA-friendly” firms usually prohibit strategies they consider exploitative of their pricing or risk model:

  • Latency / arbitrage exploits
  • Tick scalping and ultra-high-frequency entries
  • Reverse / hedge arbitrage across accounts
  • Copy trading identical positions across many accounts
  • Sometimes martingale/grid bots on specific accounts

These bans exist because such strategies can profit from the simulated or brokered environment rather than genuine market edge.

The multi-account trap

If you run the same EA across several funded accounts, some firms treat it as one coordinated position and may restrict or void it. If you plan to scale a bot across accounts, check:

  • The multi-account policy.
  • Whether copy/mirror trading is allowed.
  • Any disclosure requirement.

How to verify before you buy

  1. Read the rulebook, not the homepage. Search for “EA”, “automated”, “algorithmic”, “copy”.
  2. Check prohibited-strategy lists for your bot’s technique.
  3. Ask support in writing if your strategy is borderline, and keep the reply.
  4. Confirm the drawdown model — bots that hold positions interact badly with intraday trailing drawdown (EOD vs trailing drawdown).

Checklist for automated traders

  • Firm’s rules explicitly permit EAs/automation
  • Your specific technique isn’t on a banned list
  • Multi-account / copy rules fit your plan
  • Drawdown model suits a position-holding bot
  • You’ve confirmed anything borderline in writing

Disclaimer: Independent educational content, not affiliated with any firm and not financial advice. Some links may be affiliate links.