I have just compiled a list of chart patterns that everyone should know when starting technical analysis. Today, I want to share detailed information about the four most common triangle types: descending triangle, ascending triangle, symmetrical triangle, and expanding triangle. Each has its own way of reading, signals, and different entry methods.

Let's start with the descending triangle pattern. This is a pattern I often see appearing in downtrends. Its structure is quite clear: there is a horizontal support line at the bottom, while the resistance line above is continuously declining. This indicates increasing selling pressure, with the price being pushed down each time it attempts to rise.

When looking at this descending triangle pattern, I focus on two main points. First is the horizontal support line — it’s tested multiple times but rarely broken through. Second is the downward-sloping resistance line, clearly showing that sellers are in control. When the price breaks below support with increased volume, that’s when I enter a sell position. But I wait for confirmation; don’t rush in. The increased volume after the breakout is an important sign that this is a genuine breakout, not a false one.

For a short position in the descending triangle, I usually place a stop loss above the last resistance line to protect myself. Close the trade when the price reaches a new support or shows strong reversal signs. A note: be cautious of false breakouts, especially when trading volume is low. This pattern is most accurate when volume decreases as the price approaches support.

Next is the ascending triangle, which is the complete opposite of the previous pattern. The resistance line is horizontal at the top, while the support line is rising at the bottom. I often see this pattern forming within an uptrend, indicating increasing buying pressure. Each time the price pulls back, it bounces higher than the previous low, creating higher lows.

The way to read this pattern is similar but reversed. The horizontal resistance line shows that this price level is hard to break, but the upward effort continues. When the price breaks above the resistance with increased volume, it’s a buy signal. I will enter a buy order and place a stop loss below the last support line. Profit targets can be set at the next resistance level or overbought zones. This pattern is ideal for trading within the current uptrend.

Then comes the symmetrical triangle, which is more neutral. The resistance line slopes downward, and the support line slopes upward, converging at a point. This pattern forms during consolidation, with the price making lower highs and higher lows. Its interesting feature is that it can break out either upward or downward, depending on whether buyers or sellers are stronger.

For symmetrical triangles, I don’t enter a trade before a clear breakout occurs. I wait for the price to break either side of the pattern with strong volume. If it breaks upward, I open a buy; if downward, I open a sell. Increased volume during the formation of the pattern can signal an impending breakout. Close the trade when reaching profit targets or signs of reversal.

Finally, the expanding triangle pattern is quite different. Instead of converging, the support and resistance lines diverge further apart. This indicates increasing volatility, often appearing in trending markets or after major news. I see it forming when there’s a significant imbalance of buying and selling power.

With the expanding triangle, I am more cautious when entering trades because it’s less stable. Traders often enter positions after the price breaks out of the support or resistance lines of the pattern. Place stop losses outside the furthest point of the pattern to protect against wild movements. Be careful with increased volatility during the formation of this pattern.

Some important points I want to emphasize: First, volume is very important — increased volume after a breakout can confirm the signal. The more volume, the stronger the likelihood of a significant move. Second, these patterns tend to be more accurate when identified within a clear trend. Ascending and descending triangles are more suitable within current uptrends and downtrends, respectively. Third, risk management is always a priority — using stop-loss orders is crucial to protect your capital from unexpected swings.

Understanding the characteristics and breakout signals of each pattern can help improve trading accuracy. I often combine these patterns with other indicators to confirm signals, which increases the potential for profit in technical analysis. Hope this sharing is helpful to you.