Unfortunately no such functionality exists to limit the number of trades made in an account at this time. If you would like to configure precautionary settings for individual trades, you may do so through TWSor IBKR Mobile.
Can I limit the number of trades in my account as a precaution?
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Is there a way to set position limits?
How do I change the Precautionary Settings in IBKR Mobile?
Is it possible to set a minimum holding period for assets in my account?
Is there a limit on the number of stocks I can short?