It depends on your plan.
Where they are allowed
On EOD, 1-Day-Pass-Plan, Flex and Instant Classic, personal automated strategies and EAs are allowed, as long as they are consistent with your trading style and do not exploit system vulnerabilities, latency, or data feed anomalies. Strategies designed to manipulate the simulated environment rather than reflect genuine market trading are prohibited.
Where they are not
Daily Payouts and Instant Lite are manual trading products. Bots, Expert Advisors and automated strategies are not permitted on either, and neither are grid, martingale or high frequency strategies.