This is risk management in your trading. This is a key point in trading. It is impossible to profit in the medium / long term without following strict money management rules in Forex. First, you need to use a stop loss for all of your positions. Trading is a bullish or bearish scenario. Therefore, it is a hypothesis that may or may not be realized. That is why, before taking a stand, you must state the level at which you think your scenario will not materialize. This is your stop loss level