Understanding Trendline: Definition, Drawing, and Trading Strategies

📅 Translated: 2026-05-26 · Original (Vietnamese): 🇻🇳 Read in Vietnamese
🤖 This article was automatically translated from Vietnamese using Vnstock AI. For the most accurate version, refer to the original Vietnamese article.

## 🔍 Definition

Trendline, also known as the line of trend, refers to a line that connects a minimum of 3 points of contact (peaks or troughs) on a stock chart, such as those of Vietcombank (VCB), FPT, or HPG. With only 2 points, the line is considered tentative.

✔ Drawing Rules

  1. Minimum of 3 points of contact
  2. Reasonable distance between points (not too close)
  3. Moderate slope (not too steep, > 60° = unsustainable)
  4. Drawing through significant peaks/troughs, not all of them

🏈 Trading Strategies

📈 Example: VHM 2024

An upward trendline can be drawn from the lows of 38K (03/2024), 41K (05/2024), and 47K (08/2024). Each time the price touches the trendline with an RSI < 40, it's a buy signal, resulting in 3 winning trades.

🚀 Drawing Tools on Vnstock

The symbol modal on Vnstock offers trendline drawing tools with auto-detection of significant pivots, allowing for accurate drawing from the start.

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