Each currency symbol is affected when there is a news release in some way, but the significant spikes you see are for the currency pair itself so the EURUSD would be affected by Euro and USA news, we recommend that during high-impact news events, you do not open trades just before they happen as this produces unpredictable movement in price that can hit your stops.
Sometimes other currencies impact EURUSD, but these are usually very small.
The title of the subject in this post is correct.
Remember the semi-automated trading systems require someone with trading experience to know when to close trades at the right time, the system you are using helps with accurate trade entries and risk management.
