Chart Patterns Worth Knowing

Chart patterns are the most heavily marketed part of technical analysis and the part with the weakest evidence behind it. That is not an argument for ignoring them. It is an argument for keeping the few that describe something real and discarding the rest — and for being honest about what even the good ones are worth.

Mechanism over shape

A pattern is worth knowing when you can say what the participants were doing to produce it. If the only thing you can say is what it looks like, you have a shape.

Each of those is a sentence about buyers and sellers, and the shape is a by-product. That matters practically: a mechanism tells you what would invalidate it, and a shape cannot.

Why the shape alone is unreliable

• Patterns are identified by eye, and the eye finds them in random data as readily as in real charts.
• Definitions are elastic. How far apart must the two tops be? How much slope makes a flag a wedge? Every answer is someone's preference, so "the pattern worked" is rarely a repeatable claim.
• Published hit rates are measured with hindsight, on patterns selected after their outcome was visible. That selection alone accounts for a large part of the reported success.

Continuation patterns

These describe a pause inside a move. They are the more reliable family, because the thing they predict — a trend continuing — is the more common outcome anyway.

What makes one worth taking

1. A real move preceded it. A flag with no flagpole is just a small range.
2. It is proportionate. The pause should be short relative to the move. A "flag" lasting longer than the move that preceded it is a reversal in progress.
3. It is tightening. Range contracting and candles shrinking is the mechanism visible; a widening pause is something else.
4. It sits with the higher-timeframe context from lesson 6. A bullish flag against a daily downtrend is a countertrend trade wearing a continuation pattern's clothes.

Reversal patterns

These claim a trend is ending. They are less reliable, for the straightforward reason that trends continue more often than they reverse — so the pattern is betting against the base rate before it starts.

Notice what is doing the work in the first three rows: a level breaking. The pattern is a way of noticing that a particular level became important. The trade is the break, which is the same trade lesson 1 described, and the pattern is merely how you found the level.

Honest expectations

Numbers vary by instrument, timeframe and definition, but the shape of the answer is consistent across serious studies:

• No common pattern is reliably better than a coin toss on direction alone.
• The better ones earn their money from reward-to-risk, not from hit rate — a clean invalidation close to entry and a target further away.
• Edges that exist are small, and they are eaten by costs on short timeframes, which is where most pattern trading happens.

That is not a reason to abandon patterns. It is a reason to stop expecting the pattern to be the edge, and to let it do the job it is actually good at: locating a place where a small stop and a larger target sit close together.

Invalidation, stated first

Every pattern in this lesson has a price at which it has failed. Writing that price down before entering is what converts a shape into a trade.

Then run the same four checks the rest of this site has been building toward:

1. Where is the invalidation? That is the stop, and Track 5 turns it into a size.
2. Where is the target? The next level from the higher timeframe, not a measured move from the pattern's height.
3. Is the reward-to-risk acceptable before the trade, at those two prices?
4. Does the context permit it? The lesson-4 classification, applied before the pattern was found rather than after.

A pattern that passes those four is a trade. A pattern that fails them is a picture — and the difference between a trader and a chart enthusiast is almost entirely whether the four questions get asked before the entry or after the loss.