如果您想在外匯交易中成為一個盈利的交易員，那麼你理解止損對你來說就是非常重要的。
好的交易員在接受失敗和承認他們已經犯了錯時不會猶豫。你不可能每次選擇的交易都是正確的，而你越早意識到這點，你就能越早降低你的損失。
設想一個交易員以30美元的價格購入一支股票，希望它能長到34美元，卻看到價格突然下跌。這時候決定何時賣掉這只股票並承認自己是錯誤的就非常重要了。如果交易員在股票剛剛跌倒29美元時就賣掉它，那麼損失就很小。而且，小損失意味著你在接下來的時間還會有足夠的資金進行交易。
在交易之前確定風險和回報是非常重要的。以上面提到的情況為例，如果那個交易員的預測是正確的，那麼交易員就會有四點的收益。而預測是錯誤的，他會有一點的損失。也就是在這個案例中匯報和風險的比例是四比一。
現在讓我們假設這個交易員在四單交易中正確了兩單，這就意味著這個交易員賺了8點，損失了兩點。在這種情況下，這個交易員在正確率50%的情況下獲得了6點的收益。即使交易員只有四分之一的正確率，他還是能拿到一點的收益。
交易員應該一直維持一個四比一的收益和風險比例。你絕不能使用二比一的比例。一個二比一的比例很可能意味著你對市場的走向根本沒有判斷。許多時候市場都是突然轉向，許多交易員都是手握資金而不重新進行交易。
你容易在市場環境下的紙上模擬交易中發現。結果會向你展示你不把錢投入這些交易中是個正確的決定。我們要記住的最重要的事是選擇不交易和交易正確都是正確的方法。無紀律交易的結果通常會招致損失。
Understanding Stop Losses
A proper understanding of stop loss in Forex trading is essential if you want be a winning trader. Good traders will not hesitate to accept defeat and acknowledge that they made a mistake. It is impossible to be right every single time and the sooner you accept this, the sooner you will start minimizing your losses.
Namely, imagine that a trader purchases a stock for the price of 30 dollars, expecting it to rise to 34 dollars, only to see it go down abruptly. Deciding when to sell and when to acknowledge that a mistake has been made is of crucial importance. If the trader sells the stock as soon as its price falls below 29 dollars, the resulting loss would be small. Moreover, minor losses mean that there will still be money to trade on the following day.
Determining the risk and reward ratio prior to assuming a position is obligatory. If we take the above-mentioned case, had the prediction turned out to be right, the trader would have won four points. A wrong prediction would have implied losing one point. This means that the risk and reward ratio in this specific case is four to one.
Now, let us assume that the trader was right in two out of four trades, i.e. fifty percent. That means that the trader won eight points (two times four points) and lost two points (two times one point). This gives us an overall profit of six points and the trader only guessed fifty percent of the trades. Even if the trader was so bad that they were only right in twenty-five percent of the trades, there would still be a profit of one point.
Traders should always maintain a four to one risk and reward ratio. You should never go for a two to one ratio. A two to one ratio means that most likely there is no telling what direction the market will take. Most frequently the market moves sideways and a great number of traders squander their money instead of just refraining from trading.
You can easily check this out for yourself by simulating trades on paper in these market circumstances. The results will show you that you made the right choice not to put your money on those trades. The most important thing to remember is that choosing not to trade and being right is also a way of winning. Being undisciplined with regard to this fact will ultimately result in loss of money.
本文翻譯由兄弟財經提供：
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