Quick answer: Open at least one trade within any 10 consecutive days, on evaluation and funded accounts alike. On the tenth day without a trade, the account becomes inactive.
The rule
Applies to every program and every stage
Applies regardless of performance — hitting your profit target doesn't exempt you
Planning a break? Manage the account accordingly
If your account is already inactive
You may no longer be able to open trades. Contact support with your registered email, account number, the date and time of your last opened trade, a screenshot of the inactive status, and a short explanation.
Reactivation is never guaranteed — any review depends on account history, previous exceptions, applicable terms and management approval. Support cannot backdate a trade or create missing trading days.
See also: Why Is My Account Inactive?