Wyckoff Method: Spring, Upthrust, SOS, SOW, and Other Named Events

Direct Answer

The Wyckoff Method is a technical-analysis framework for reading supply and demand from price and volume inside a trading range. It uses a set of named events -- spring, upthrust, sign of strength (SOS), sign of weakness (SOW), last point of support (LPS), last point of supply (LPSY), secondary test (ST), selling/buying climax (SC/BC), and automatic rally/reaction -- to interpret whether a range is more likely resolving into accumulation (before an uptrend) or distribution (before a downtrend).

Key Takeaways

• The Wyckoff Method reads supply-and-demand behavior from price and volume inside a trading range, not from a single indicator or formula.
• Each named event -- spring, upthrust, SOS, SOW, and the rest -- is an interpretation of a specific piece of range behavior, and this page defines them individually.
• The full step-by-step accumulation and distribution schematics, including the labeled Phase A-E structure these events sit inside, live on their own dedicated pages, linked throughout below.
• These are read-based, interpretation-driven concepts from a specific, well-established methodology -- not universal certainties or mechanical signals.
• Analysts typically look for several of these events, and supporting volume behavior, to line up together rather than relying on any single one in isolation.

What Is the Wyckoff Method?

The Wyckoff Method is a technical-analysis approach developed by Richard Wyckoff in the early 1900s and still taught today, including in the CMT (Chartered Market Technician) curriculum. Its central idea is that price and volume together reveal the ongoing contest between supply and demand, and that large, informed participants tend to accumulate positions quietly before a markup phase, or distribute positions quietly before a markdown phase, rather than announcing their intentions.

Wyckoff analysts read this contest through the shape and volume signature of trading ranges: how price behaves at the edges of a range, whether breakouts hold or fail, and whether volume expands or contracts at key turning points. Over time this reading produced a specific, named vocabulary for recurring events inside those ranges -- the nine covered on this page.

This page defines each named event on its own as a glossary-style reference. The full phase-by-phase structure those events fit into -- Phase A through Phase E, and how the events sequence together -- is covered in depth on two companion pages: Wyckoff accumulation for the bullish schematic, and Wyckoff distribution for the bearish mirror-image schematic. Read this page for what each term means; read those pages for how the terms sequence into a full range.

Spring and Upthrust (Including UTAD)

Wyckoff Spring: a decisive break below a trading range's support during accumulation that quickly reverses back into the range. It's interpreted as a final test for remaining supply -- an attempt to trigger stop-losses and shake out weak-handed sellers just before markup begins. A spring that reverses on comparatively light volume and holds above the range low is read as more constructive than one that lingers below support or occurs on heavy, sustained selling.

Wyckoff Upthrust (and UTAD): the mirror-image event during distribution -- a decisive break above a trading range's resistance that quickly reverses back into the range. It's interpreted as trapping late buyers who bought the breakout, and as a test of remaining demand before markdown. UTAD stands for Upthrust After Distribution; the term is generally reserved for an upthrust occurring later in the distribution range, often closer to the transition into markdown, rather than an earlier upthrust seen while the range is still developing.

Neither event is confirmed by the break itself -- it's the failure to hold beyond the range, and the character of the move back inside, that gives the event its meaning. A break that holds and continues is, by definition, not a spring or an upthrust but a genuine breakout in that direction.

Sign of Strength and Sign of Weakness

Wyckoff Sign of Strength (SOS): a rally that pushes through a trading range's resistance on increased spread (the distance between the period's high and low) and increased volume, during accumulation. It's read as evidence that demand has decisively overcome supply, and is typically treated as more significant than an ordinary breakout because of the accompanying expansion in both range and participation.

Wyckoff Sign of Weakness (SOW): the mirror-image event during distribution -- a decline that pushes through a trading range's support on increased spread and volume, read as evidence supply has decisively overcome demand.

Both are interpreted in the context of what preceded them inside the range (springs, upthrusts, and prior tests) rather than as standalone breakout signals -- the same price move without that context is just a breakout, not necessarily a Wyckoff SOS or SOW.

Last Point of Support and Last Point of Supply

Wyckoff Last Point of Support (LPS): a pullback that follows a Sign of Strength and holds above the breakout level -- the former resistance, now acting as support -- typically on lighter volume than the SOS itself. It's viewed as the last relatively low-risk area to establish or add to a position before markup, since it confirms the prior breakout held rather than failed.

Wyckoff Last Point of Supply (LPSY): the mirror-image event following a Sign of Weakness -- a rally that fails to reclaim the breakdown level, the former support now acting as resistance, typically on lighter volume. It's viewed as the last area to exit a long position or consider a short before markdown continues.

Both events are read as confirmation, not as the primary signal -- the SOS or SOW is what establishes direction; the LPS or LPSY is the test of whether that move holds.

Secondary Test

Wyckoff Secondary Test (ST): a return to near a prior extreme -- the Selling Climax low during accumulation, or the Buying Climax high during distribution -- on comparatively lower volume and a narrower price spread than the climax itself. A secondary test is interpreted as checking whether the initial climax genuinely absorbed the selling or buying pressure that produced it. A range can see more than one secondary test, and each one is read individually rather than assumed to behave identically.

Selling Climax and Buying Climax

Wyckoff Selling Climax (SC): a sharp, high-volume, wide-range decline to a low that ends a downtrend, interpreted as panic selling being absorbed by larger, better-capitalized buyers. It typically marks the start of an accumulation range.

Wyckoff Buying Climax (BC): the mirror-image event -- a sharp, high-volume, wide-range advance to a high that ends an uptrend, interpreted as aggressive, urgent buying being absorbed by sellers distributing into strength. It typically marks the start of a distribution range.

Both events are identified largely in hindsight, once the subsequent range behavior confirms the climax actually halted the preceding trend rather than merely pausing it.

Automatic Rally and Automatic Reaction

Wyckoff Automatic Rally (AR): the sharp rebound that immediately follows a Selling Climax, as the intense selling pressure that produced the climax exhausts itself. The AR's high roughly marks the upper boundary of the developing accumulation range.

Wyckoff Automatic Reaction: the mirror-image event immediately following a Buying Climax -- a sharp decline as urgent buying pressure exhausts itself. Its low roughly marks the lower boundary of the developing distribution range.

Together with the climax that precedes it, the automatic rally or reaction is what first sketches out the approximate boundaries of the range that the rest of the sequence -- secondary tests, springs or upthrusts, SOS or SOW, LPS or LPSY -- will develop inside of.

Wyckoff Events Summary Table

The table below groups all nine events by which phase of a range they're typically associated with and whether they appear in accumulation or distribution. For the full ordered sequence, see the accumulation and distribution schematic pages linked above.

Common Mistakes

• Labeling every break below a range's low a "spring," or every break above a range's high an "upthrust," without checking whether it actually reversed decisively and without other confirming signs like volume character.
• Treating a single event -- one SOS, one spring -- as a complete signal rather than looking for several events and volume clues to line up together, as Wyckoff analysis generally calls for.
• Confusing an ordinary breakout with a Sign of Strength or Sign of Weakness when the accompanying volume and spread expansion isn't actually present.
• Assuming a UTAD and an ordinary upthrust are interchangeable, when the distinction is about where in the range's development the event occurs.
• Identifying a Selling or Buying Climax in real time with confidence, when in practice these events are often only confirmed once subsequent range behavior plays out.
• Skipping the full phase context -- reading these events in isolation from the accumulation or distribution schematic they belong to, rather than as part of a sequence.

Wyckoff Terminology Checklist

• Identify the climax (SC or BC) and the automatic rally or reaction that follows it, since together they sketch the range's rough boundaries.
• Look for at least one secondary test and note its volume relative to the climax it's testing.
• Check whether a break beyond the range's boundary reversed decisively (spring or upthrust/UTAD) or held and continued (a genuine breakout instead).
• Confirm a Sign of Strength or Sign of Weakness with actual spread and volume expansion, not just a directional move.
• Look for a Last Point of Support or Last Point of Supply confirming the SOS or SOW held before treating the range as resolved.
• Cross-check the full sequence against the Phase A-E structure on the accumulation or distribution schematic page before drawing a conclusion.

Naming Events Before You Know Which Ones They Were

The Wyckoff vocabulary assigns specific names to specific events within an accumulation or distribution, and those names carry implications about what follows. The difficulty is that the events are identified by their role in a structure that is not complete, so a low being labelled a spring is a claim about the future disguised as a description of the past.

Use the framework for the reasoning rather than the labels. The underlying observation, that a security absorbing supply behaves differently from one where supply is exhausted, is a substantive one and is examined through volume and the character of the reactions. That examination can be done without committing to a label.

The mistake is retrospective labelling, which the method is unusually prone to because its vocabulary is rich enough to name whatever happened. A structure that failed is relabelled as a different phase, and the framework retains its apparent accuracy by never having been testable.

The schematics also depict idealised sequences. Real accumulations skip events, repeat them, and extend far longer than the diagrams suggest, and a structure that does not match the schematic is the normal case rather than a failed one.

Wyckoff Method FAQs

References

• CMT Association: Technical Analysis Body of Knowledge and Research
• CFA Institute Research and Policy Center: Investment Research
• SEC Investor.gov: Trading Basics: Order Types