Harmonic Patterns in any Markets. Harmonic price patterns take geometric price patterns to the next level by using Fibonacci numbers to define precise turning points. Unlike other common trading methods, Harmonic trading attempts to predict future movements. (Investopedia)
The patterns were introduced to the trading world by Harold McKinley Gartley in 1932. Gartley created a pattern which he named after himself and outlined in his 1935 book, Profits in the Stock Market.
These patterns used for turning points or completion of one swing move.
See BEL charts Pattern completed on 19 may 2021. Price not reversed but took some time.