Trading psychology is very dominant in the forex market, making a major contribution to trader decisions. There is an indicator that is useful for analyzing the market through trader behavior which is reflected in an index called the Fear and Greed Index indicator, this indicator reflects market behavior towards an asset, the indicator value is described as a value of 0-100. A value of 0 means the market is extremely fearful, which shows that the market is very, very worried about asset values continuing to fall and triggering asset sales. However, because the market is undervalued when the indicator shows a value of 0, the possibility of correction is very high, where some investors buy assets when the price is undervalued.
On the other hand, when the index shows a value of 100, it means the market is extremely greedy, perhaps the price is overvalued and there is a possibility of correction. I found a good article about this indicator on the FXOpen Blog article with the title "Fear and Greed Indicators in Stock, Forex and Crypto Trading"