Investors should be highly alert to the judgment and sensitivity of the third line of KDJ when trading at any time. KDJ three-line indicator is one of the most important commonly used indicators in foreign exchange trading. In the price change, these three lines have different upward and downward trends, and there are obvious cross signals in the operation. However, under the influence of external factors, they also have a unilateral tendency and show their own strong and weak forms. In the course of the transaction,

2. Brinboll index

In the foreign exchange trading market, there are many most popular commonly used indicators, and the Bollinger Band is one of them. The bollinger band consists of only three parts. By judging the running trend of the K-line near the upper rail, the lower rail and the middle rail, we can judge whether the transaction is appropriate. For example, in the process of trading selection, the K line appears near the middle rail and the lower rail, suggesting that the currency is in a weak trading position. In addition, the K-line crosses the track. If all kinds of trends are carried out, this situation shows that the next short time will enter a rebound period, but during this rebound period, the K line will often fall near the track line, so trading must be considered in the trading process.