trading is most risky in my opinion when we cannot control emotions well and when we are easily tempted by market conditions that are tempting for entry.
When trading forex no yet finding profitable trading system, forex is risky, in addition trader can't control emotion, the next decision trading only based emotion is not good result. And no all time is good for trading, in news high impact also often making difficult to trading because higher volatility could make the prices up and down in short time. It will impact to emotion.