HH, HL, LH, LL: A Simple Scheme That Explains a Lot

HH, HL, LH, LL are four labels for highs and lows that turn reading market structure into a simple, visual scheme. Behind these letters lies the entire logic of trend and reversal. Once you understand them, you start to see not chaos on the chart but a clear sequence. Let's break down what each label means and how the scheme explains price behavior.

What the four labels mean

The four abbreviations describe where the next extreme sits relative to the previous one of the same type. HH (higher high) is a rising peak, a high above the previous high. HL (higher low) is a rising trough, a low above the previous low. LH (lower high) is a falling peak, below the previous one. LL (lower low) is a falling trough, below the previous one. Each new extreme gets its label, and their sequence builds the picture of the trend.

Uptrend: HH and HL

In this scheme an uptrend is an alternation of HH and HL: price makes higher highs (HH) and higher lows (HL). Each new peak is higher, each new trough higher, the market moves steadily upward. As long as the HH and HL sequence holds, the uptrend is alive, and it makes sense to trade with it (entering on pullbacks upward). The appearance of HH and HL is an objective confirmation that the trend is up, not a subjective sense of a rally.

Downtrend: LH and LL

A downtrend is the mirror image: an alternation of LH and LL. Price makes lower highs (LH) and lower lows (LL), each peak lower, each trough lower, the market moves steadily down. As long as the LH and LL sequence holds, the downtrend is alive, and it makes sense to trade with it (entering on pullbacks downward). The scheme gives a symmetric, objective definition of both trend directions through simple labels for the extremes.

Reversal through a change of labels

The main strength of the scheme is that it clearly shows reversals. A change in the character of the sequence signals a possible change of trend. For example, in an uptrend (HH, HL) price stops making HH and instead forms an LH (lower high), then an LL (lower low), the sequence has broken, and the structure has shifted from up to down. That is the break of structure, an objective reversal signal. By tracking the transition from HH/HL to LH/LL (or vice versa), a trader spots a change of trend from price itself rather than from lagging indicators.

Practical takeaway

HH, HL, LH, LL are labels for highs and lows that give a simple scheme for reading structure. HH (higher high) and HL (higher low) build an uptrend; LH (lower high) and LL (lower low) build a downtrend; a range is when there's no clear sequence. A reversal shows up through a change of sequence: the transition from HH/HL to LH/LL (or vice versa) is a break of structure, a signal of a trend change. Use the scheme to objectively define trend direction, trade with it (entering on pullbacks in the trend's direction), and spot reversals from price itself. Understanding the four labels turns chart reading from guesswork into visual logic: behind the simple letters lies the entire mechanics of trend and reversal, and once you master it, you see market structure clearly, without relying on lagging indicators.

This material is for educational purposes and is not individual investment advice.