For Example:

As a rule of thumb for determining a trend in a chart, three points are required in order to be able to identify a trend. 
These three points are a low and two highs (uptrend) or two lows and a high (downtrend).
A trend can be described as an identifiable direction of development or a strong tendency.
However, in trading, a trend is one of the most important concepts and even the most important concept of technical analysis. 
A trend describes the course of a chart within a certain period of time.
Trend-following chart patterns form when price takes a breather within a clear uptrend or downtrend, that is, when price moves in the opposite direction (or sideways) for a short period of time.
A trend channel consists of two trend lines. In an uptrend, there is one trendline below the lows (the trendline that defines the trend) and one above the highs. 
The area between these two lines is the trend channel. 
The upper line of a trend channel is a resistance.
A Head and Shoulders (SKS) pattern is a reliable reversal pattern in trading. 
The so-called SKS chart pattern is used in chart technology at different time levels and is suitable for trading stocks, foreign exchange (forex trading), commodities, cryptos and other trading asset classes.

Divergence: divergence, loss of mass; Convergence: confluence, accumulation, mass gain. In meteorology, divergence and convergence are predominantly applied to the wind vector and are thus directly related to airflow.
Oscillators are technical indicators that “oscillate” (oscillate = oscillate) between an upper and lower limit. They show the extreme phases in price development and can diagnose exaggerations in the market.