The best trader is the one who is always able to cope with sudden market movements. The main market trend is always your main guide. You must change your trades whenever market trends change. You can use stop loss if the market might turn on you. and If you are a beginner in forex always set stop loss. Let stop loss get hit if the trade is against you. Then close the store for the day and trade the next day. Learn to take losses well without seeking revenge on the market.