Simple Chart Patterns: The Few Worth Knowing and How Often They Fail

On Wednesday at 8:30 a.m. ET, Sam pulls up Tuesday's XYZ chart and looks at the doodle in his notebook marginMarginMargin is money borrowed from your broker, secured by the cash and securities in your account, that lets you hold a larger position than your own cash would allow. For example, with the standard 50% initial margin, $10,000 of equity can buyRead definition →. Before the 10:50 break, price kept hitting the same $52.60 ceiling while each dip stopped a little higher than the last. A flat top and a rising floor.

He searches "flat top rising bottom chart" and lands on a YouTube video promising "the 40 chart patterns every trader must know." Forty. He closes it at pattern number six.

Here's the good news: you don't need forty. A handful of shapes show up again and again, and every one of them is built from things you already know: candles, supportSupportSupport is a price level where buying pressure has historically overcome selling pressure, causing price to stop declining and reverse — it's the floor where demand enters the market, and when it holds, it's a potential long entry; when it Read definition → and resistanceResistanceResistance is a price level where selling pressure has historically overcome buying pressure, causing price to stall, reverse, or consolidate — it's the ceiling where supply enters the market and where breakout traders watch for either a coRead definition →. The harder part, and the part most videos skip, is how often those shapes fail.

By the end of this lesson you'll be able to recognize the four pattern families worth knowing, tell a continuation pattern from a reversal, judge when a pattern is actually complete, and explain honestly how often patterns fail. If you're new, start with Lesson 22: Support and Resistance, because every pattern here is support and resistance arranged into a shape.

A chart pattern is a shape that price traces on a chart, often enough that traders have given it a name, as buyers and sellers push against support and resistance. Flags, triangles, double tops and head and shoulders are the best-known examples.

Think of clouds. Dark, low, thickening clouds don't guarantee rain, but you'd be silly to ignore them before a picnic. A chart pattern works the same way: it describes conditions that have often come before a certain kind of move, and it says nothing certain about what happens next.

Patterns form for the same reason levels do. Traders remember prices, react at the same places and place orders where everyone else is looking. When those reactions repeat in a recognizable sequence, you get a pattern. If you can read a candle (Lesson 21: Candlestick Charts) and mark a level, you already have everything you need to read one.

A continuation pattern is a pause inside a trend that often ends with the trend resuming. A reversal pattern is a shape that often forms when a trend runs out of steam and changes direction.

Some shapes can go either way. A symmetrical triangle, for instance, can break up or down, so the break itself tells you the direction.

A bull flag is a sharp rise (the "pole") followed by a short, orderly drift down or sideways (the "flag"), which often ends with another move up. A bear flag is the mirror image: a sharp drop, a weak bounce, then often another leg down.

The story behind a bull flag is simple. Something pushes the stock up fast. Early buyers take some profit, so price eases back. But the dip is shallow and quiet because new buyers keep absorbing the selling. If buyers win that tug-of-war, price pushes out of the top of the flag.

What a cleaner flag tends to look like:

Bear flags matter even if you never short a stock. Shorting needs a margin account, and if you're holding shares when a bear flag forms, it's a warning that sellers are still in charge.

A triangle pattern is a range that keeps getting narrower as highs and lows squeeze together, until price breaks out of one side. There are three common types.

Sam's doodle was an ascending triangle. On Tuesday, the ceiling sat at $52.55 to $52.64 while the dips stopped at $52.30, then $52.42, then $52.50. Each pullback, buyers were willing to pay a little more. At 10:50 the ceiling gave way.

Triangles are a good example of why names can mislead. "Ascending" describes the shape, and the break can still go the other way. Watch which side breaks.

A double top is two peaks at roughly the same price with a dip between them, shaped like an "M". It suggests buyers failed twice at the same ceiling. A double bottom is the opposite, a "W": two lows at about the same price, suggesting sellers failed twice at the same floor.

The key line is the neckline: the low between the two peaks of a double top, or the high between the two lows of a double bottom. A double top only counts as complete when price closes below its neckline. Until then, you're just looking at a stock that touched resistance twice, which happens all the time.

You already know why the second peak forms. Lesson 22 showed you how traders who missed selling the first time, or who are stuck from buying near the top, often sell when price returns to the same level.

A head and shoulders pattern is three peaks in a row, with the middle one (the head) higher than the two on either side (the shoulders), and a neckline drawn under the two dips between them. It's one of the best-known reversal patterns, and it suggests an uptrend is losing strength.

Read it as a three-act story:

The pattern completes when price closes below the neckline. An inverse head and shoulders is the upside-down version at the end of a downtrend: three lows with the middle one deepest, completing when price closes above the neckline.