It is not possible to apply a trading restriction for a particular symbol or instrument on your account. As a self-directed broker/dealer, the account holder is responsible for the trading activity on the account.
Can I apply a trading restriction for certain symbols on my account?
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What is the Pattern Day Trading (PDT) rule, and how does it affect my trading?
Can I have a second username for my paper trading account?
How do I download my paper account Activity Statements?
What is Proof of Trader Authority?