This feature will complement the Automated Calendar control.
If you enable this feature, it means when there is a news coming up for a particular country, the corresponding pair will stop trading. For example, AUD news is coming up, AUDUSD, AUDCAD, AUDCHF, AUDJPY and any AUD pairs will stop trading.
USD news is always assumed to be applicable for ALL pairs. For example, CADCHF, even though USD is not featured here, will also be exempted from trading during USD news period.