Accumulation is the range where the Composite Operator buys a large position after a downtrend. Wyckoff mapped the typical events inside that range into a schematic: a template you compare with real charts. Real markets rarely match it perfectly, but the sequence of events is remarkably consistent.
Phase A: stopping the downtrend
- PS (preliminary support): the first real buying after a long decline. Volume rises, but the decline usually continues.
- SC (selling climax): panic selling on very high volume, often a wide candle with a long lower wick. Large buyers absorb it.
- AR (automatic rally): with selling exhausted, price bounces sharply. The AR high marks the top of the range.
- ST (secondary test): price returns toward the SC low, on lower volume. Less selling pressure confirms the climax.
Phase B: building the cause
The longest phase. Price rotates between the SC low and AR high while the Composite Operator accumulates. There may be several secondary tests, and sometimes a push above the range high. Volume tends to shrink as available supply dries up.
Phase C: the spring and test
The spring is a drop below the range low that quickly reverses back inside. It shakes out the remaining sellers and triggers their stop-losses, letting large buyers fill at the best prices. A test of the spring area on low volume confirms that supply is gone. Not every accumulation has a spring; sometimes the last test simply holds above the low.
Phase D: demand takes control
- SOS (sign of strength): a strong rally on rising volume that breaks above the range high (the "creek").
- LPS (last point of support): a pullback after the SOS that holds above the range, on low volume. Often the best-risk entry.
- BU (backup): a pullback to the old range high, now acting as support, before the trend begins.
Phase E: markup
Price leaves the range and trends higher, with demand clearly in control. Pullbacks are shallow and short.
| Event | Phase | What it means | Volume |
|---|---|---|---|
| PS | A | First buying interest | Rising |
| SC | A | Panic selling, absorbed by large buyers | Very high |
| AR | A | Bounce that sets the range high | Moderate |
| ST | A / B | Retest of the lows with less selling | Lower |
| Spring | C | Shakeout below the range low | Varies |
| Test | C | Retest of the spring with little selling | Low |
| SOS | D | Breakout above the range high | High |
| LPS / BU | D | Pullbacks that hold as support | Low |
Key takeaways
- Accumulation is the range where large buyers build a position after a downtrend.
- Phase A stops the decline (PS, SC, AR, ST); Phase B builds the cause.
- Phase C's spring shakes out sellers below the range; a low-volume test confirms supply is gone.
- Phase D's sign of strength and last point of support lead into the Phase E markup.