I've always found the triangle patterns in technical analysis particularly interesting. Recently, I saw some discussions about these chart formations, so I decided to organize four common types of triangles and share them with everyone.

Let's start with the descending triangle. This is a clear bearish signal, characterized by a horizontal support line at the bottom and a gradually descending resistance line at the top. In simple terms, the price rebounds are getting lower each time, indicating increasing selling pressure. If the support level is broken, it's usually a good opportunity to short. Keep in mind that volume is crucial; false breakouts often occur with low trading volume, so volume confirmation is essential.

Conversely, the ascending triangle is a bullish pattern. It features a horizontal resistance line at the top and an upward-sloping support line at the bottom. This pattern typically appears in the middle of an uptrend, indicating accumulation of buying strength. When the price breaks above the resistance line with increased volume, it may be time to go long. For risk management, stop-loss can be set just below the last support line.

The symmetrical triangle is somewhat special because it is neutral. The support line is rising, and the resistance line is falling, converging symmetrically. This pattern itself does not determine direction; it depends on which side gains more strength. A breakout above the resistance signals a bullish move, while a breakdown below indicates a bearish move. The key is not to rush into a position before a clear breakout signal appears—wait for confirmation.

Finally, let's talk about the expanding symmetrical triangle, which I find particularly noteworthy. In this pattern, the support and resistance lines are diverging rather than converging, indicating increasing volatility. This usually occurs during periods of extreme market uncertainty or ahead of major news releases. A bullish expanding triangle pattern can appear in a bull market, but this pattern is inherently unstable, so caution is advised when entering trades. Stop-loss should be placed outside the furthest volatility point to allow enough room.

There are some general points when trading these patterns. First, volume confirmation is key—breakouts accompanied by high volume are genuine signals. Second, these patterns perform better within clear trends; for example, ascending and descending triangles are more reliable when they occur in existing uptrends or downtrends. Lastly, risk management always comes first; never neglect stop-loss placement.

In fact, the bullish expanding triangle pattern, like other triangle formations, mainly involves observing the dynamic changes in support and resistance levels to assess the relative strength of buyers and sellers. If you look at multiple cycles on Gate's charts, these patterns will become increasingly clear.