I just noticed that many people are still confused about trend lines. Although they are very simple tools, using them incorrectly can lead to traps and deception.

What is a trend line? Simply put, it is a line drawn connecting high points or low points of the price to show the direction of movement, acceleration, and potential support and resistance levels. There is no fixed formula, but general principles that can cause different people to draw them differently.

Drawing a trend line is not complicated. Just drag from the lowest or highest point and connect them. You can draw from the wicks or the candle bodies, but avoid cutting through the candles. The result will be an upward slope, downward slope, or horizontal line. Each type indicates different things.

What can trend lines tell us? First, the trend. If it slopes upward from left to right, it indicates an uptrend. Price stays above the line, which can serve as support, and you can buy at that point. If it slopes downward, it indicates a downtrend. Price stays below the line, which can serve as resistance, and you can sell at that point. Second, they show support and resistance levels. In an uptrend, the trend line acts as a strong support. In a downtrend, it acts as resistance. Third, the slope of the line indicates the relationship between price and time. A slope of 0.2 means that for every 1 unit of time, the price increases by 0.2 units. Lastly, trend lines can signal trend reversals. When the price starts to break through the line, it’s a warning sign.

In actual trading, I often use trend lines with a swing trading strategy. The first step is to observe trend reversal points. The second step is to find at least three swing points and draw a line connecting them. Lines drawn from three or more points are stronger because the price has tested them three times. The third step is to observe whether the price breaks the trend line or not. As long as the price remains above (uptrend) or below (downtrend) the line, the swing trading strategy still applies. But if it breaks, you need to be cautious.

There are two strategies I like to use. The first is break and retest. When the price breaks the trend line, it often pulls back to retest. That point is a good entry for an uptrend that turns into a downtrend. If the price pulls back to test the old line and fails to break above, it becomes resistance, and you can sell there. The second is bouncing off the trend line. When the price compresses toward the line and then bounces away, that’s an entry point. Buy in an uptrend when it bounces up; sell in a downtrend when it bounces down.

But beware of false breakouts. When the price breaks the trend line, it may seem like a trend change, but then it moves back in the original direction, which can deceive traders. To avoid this, watch the volume. A strong breakout should be accompanied by high volume. Check if there was a retest of old support or resistance levels. Use additional tools like moving averages or divergence to confirm. However, false breakouts happen all the time, and there’s no 100% way to prevent them. The best approach is to set a stop loss to limit potential losses.

In summary, trend lines are simple but must be used correctly. Draw from three or more points. They indicate trend direction, support, resistance, and can help forecast price movements. But they are not sufficient on their own. Combine them with other tools, and most importantly, always manage your risk. When you understand trend lines well, they can help you make more profits and reduce losses.