Understanding Chart Patterns
Chart patterns are specific price formations on a chart that historically predict future price movement. They are the visual representation of market psychology -- the battle between buyers and sellers. Chart patterns are broadly categorized into reversal patterns (signaling a trend change) and continuation patterns (signaling the trend will resume).
Reversal Patterns
Head and Shoulders: One of the most reliable reversal patterns. It consists of three peaks: a higher peak (head) flanked by two lower peaks (shoulders). The neckline connects the lows between the shoulders. A break below the neckline signals a bearish reversal. The inverse head and shoulders signals a bullish reversal at the bottom of a downtrend.
Double Top and Double Bottom: A double top forms when price reaches the same resistance level twice before declining, creating an "M" shape. It signals a bearish reversal. A double bottom forms when price reaches the same support level twice before rising, creating a "W" shape, signaling a bullish reversal.
Triple Top and Triple Bottom: Similar to double tops and bottoms but with three tests of the level. These are considered stronger reversal signals due to the multiple failed attempts to break through the level.
Continuation Patterns
Triangles:
- Ascending Triangle: Formed by a horizontal resistance level and a rising trendline. Typically breaks to the upside in an uptrend.
- Descending Triangle: Formed by a horizontal support level and a falling trendline. Typically breaks to the downside in a downtrend.
- Symmetrical Triangle: Formed by converging trendlines with no clear horizontal level. Can break in either direction, but typically continues the prevailing trend.
Flags and Pennants: These are short-term continuation patterns that form after a sharp price movement (the "pole"). A flag is a rectangular consolidation that slopes against the prior trend, while a pennant is a small symmetrical triangle. Both typically resolve in the direction of the prior trend.
Wedges:
- Rising Wedge: A bearish pattern with converging trendlines both sloping upward. Often occurs in downtrends as a continuation pattern or in uptrends as a reversal pattern.
- Falling Wedge: A bullish pattern with converging trendlines both sloping downward. Often occurs in uptrends as a continuation pattern or in downtrends as a reversal pattern.
How to Trade Chart Patterns
- Wait for Confirmation: Do not enter a trade until the pattern is confirmed -- typically when price breaks through the neckline, trendline, or key level.
- Measure the Target: Most patterns have measurable price targets. For head and shoulders, the target is typically the distance from the head to the neckline, projected from the breakout point.
- Use Volume as Confirmation: Valid breakouts are often accompanied by above-average volume. Low-volume breakouts are more likely to be false signals.
- Set Stop-Losses: Always use stop-loss orders. For reversal patterns, stops are typically placed above the last high (for bearish patterns) or below the last low (for bullish patterns).
- Consider the Timeframe: Patterns on higher timeframes (daily, weekly) tend to be more reliable than those on lower timeframes (5-minute, 15-minute).
Common Mistakes
Traders often make the mistake of "seeing" patterns that are not clearly defined, or entering trades before the pattern is confirmed. Not every price formation that resembles a pattern is a valid trading signal. Discipline and patience are essential when trading chart patterns.