The Terms (updated 20 Oct 2026) require prior written approval for any automated trading software and ban automated software owned or developed by a third party. Whether a trade copier counts as such software isn't stated. The EA FAQ bans EAs that copy another person's signals. Only the Summer Plan page explicitly allows trade copiers or management software between your own Summer Plan accounts. You may use an EA if you own its source code and it doesn't copy others' signals, tick scalp, do latency, reverse or hedge arbitrage, run HFT or use emulators. Banned EAs also include rollover-scalping EAs, third-party EAs whose trades other traders also have open, and robots that flood the server with requests. Stop-losses must be visible. The Terms add that automated software needs prior written approval.