Chart Patterns — an Overview

A chart pattern is a recognizable shape that price traces out on a chart over time — for example a triangle, a double top, or a head-and-shoulders outline. Traders use these shapes as a shorthand for describing how buyers and sellers have been behaving: where price has repeatedly stalled, where it has bounced, and how its range has been widening or narrowing.

It is important to be clear about what patterns are and are not. A pattern is a description of past price behavior. It is not a forecast, a signal to act on, or a promise that anything specific will happen next. Two analysts can look at the same chart and draw different patterns, and a pattern that looks clean in hindsight may have been ambiguous while it was forming. Throughout this article we describe how traders commonly interpret patterns — not what you should do. Nothing here is advice, and trading carries a genuine risk of loss.

Most chart patterns are loosely sorted into two groups based on how traders tend to read them.

Continuation patterns form during an existing trend and are often interpreted as a pause before the prior trend potentially resumes. Common examples include flags, pennants, and rectangles (trading ranges). The idea traders associate with them is that price is consolidating rather than reversing.

Reversal patterns form after a trend and are often interpreted as a possible change in direction. Common examples include the double top and double bottom, and the head-and-shoulders (and its inverse). The idea traders associate with them is that the previous trend may be losing momentum.

These labels are conventions, not rules. A 'continuation' pattern can resolve into a reversal and vice versa. The grouping helps organize thinking; it does not determine the outcome.

Triangles (ascending, descending, symmetrical): price swings compress between converging trendlines. Traders often describe this as the range tightening while the market 'decides' direction. The shape itself says nothing certain about which way price will move.

Double top / double bottom: price tests a similar high (or low) twice and fails to push past it. Traders often read repeated failure at a level as a sign that buying or selling pressure at that level is being absorbed — but a third test, or a clean break, is always possible.

Head-and-shoulders: three peaks where the middle peak (the 'head') is higher than the two on either side (the 'shoulders'). The 'neckline' is the line drawn through the reaction lows between those peaks. Traders often watch the neckline as the level that defines whether the pattern is considered intact. The inverse version flips this for downtrends, with three troughs and a neckline drawn through the highs between them.

Flags and pennants: a sharp move followed by a small, tilted consolidation. Traders often describe these as brief pauses within a stronger move.

In every case, traders are interpreting behavior at and around the pattern — they are not reading a guaranteed signal. Patterns frequently fail, complete and then reverse, or only become 'obvious' after the move has already happened.

A pattern rarely stands alone. The same triangle can be read very differently depending on its surroundings, and experienced chart readers pay attention to several things at once.

Timeframe: a pattern on a 5-minute chart and the same shape on a weekly chart describe very different stretches of behavior. Patterns on higher timeframes involve more data, but none is inherently 'correct'.

Trend: whether a pattern appears within an established up- or down-trend, or in a flat market, changes how traders interpret it.

Volume and participation: some traders look at whether activity expands or contracts as a pattern forms, treating it as context rather than confirmation.

Levels and structure: nearby support, resistance, and prior swing points often matter more than the tidiness of the shape itself.

Because so much depends on context, two careful traders can reasonably disagree about what a chart is showing. That subjectivity is a normal part of pattern analysis, not a flaw to be eliminated.

You can use Pine Script to highlight basic structure — like recent swing highs and lows — that traders often reference when discussing patterns. The snippet below simply plots pivot points; it draws nothing predictive and issues no signals. It is illustrative only.

//@version=6
indicator("Swing Highs & Lows (illustrative)", overlay = true)

left  = input.int(5, "Pivot left bars",  minval = 1)
right = input.int(5, "Pivot right bars", minval = 1)

ph = ta.pivothigh(high, left, right)
pl = ta.pivotlow(low,  left, right)

plotshape(not na(ph), title = "Swing High", style = shape.triangledown,
          location = location.abovebar, color = color.red,  size = size.tiny)
plotshape(not na(pl), title = "Swing Low",  style = shape.triangleup,
          location = location.belowbar, color = color.green, size = size.tiny)

Markers print only after right bars have closed to the right of a pivot, so pivots confirm with a lag — a useful reminder that structure is identified in hindsight. A tool like this can help you see the swing points that make up a pattern; it does not tell you what price will do next.

Chart patterns are a vocabulary for describing price behavior, and they can be genuinely useful for organizing what you observe and communicating it clearly. They are not a forecasting system.

A few honest reminders: patterns are subjective and can be drawn differently by different people; they often look cleaner after the fact than they did in real time; a 'completed' pattern may simply fail; and no pattern carries a reliable success rate, despite claims you may encounter elsewhere. Past behavior on a chart does not determine future behavior.

Treat patterns as one lens among many, alongside broader market context and your own risk management. Most importantly, remember that trading involves a real and meaningful risk of loss, and nothing in this article is buy or sell advice, a recommendation, or a signal to act on.