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口袋樞紐、可買入跳空、跌破回升:三大進場訊號完整解析

14 min read

Pocket Pivot, Buyable Gap Up, Undercut & Rally: Entry Signal Types Explained口袋樞紐、可買入跳空、跌破回升:三大進場訊號完整解析

Why Entry Timing Matters

You can identify the perfect stock — RS 95, Minervini 10/10, beautiful VCP pattern — and still lose money if you enter at the wrong time. Entry timing is the difference between a 3% stop-loss and a 15% drawdown.

Professional momentum traders use specific, rule-based entry signals to minimize risk and maximize the probability that a trade works immediately after entry.

進場時機為什麼如此關鍵?

你即使找到了完美的個股 ── RS 95、明納維尼 10/10、漂亮的 VCP ── 進場時機若錯,還是會賠錢。進場時機,就是「3% 停損」與「15% 跌幅」之間的差距。

專業動能交易者使用具體、有規則可依的進場訊號,目的就是把風險降到最低,並讓進場後的勝率最大化。

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Pocket Pivot (PP) — Deep Dive

Origin

Developed by Gil Morales and Chris Kacher in their book "Trade Like an O'Neil Disciple." The concept: institutional buyers leave volume footprints inside bases that can be detected before the actual breakout.

The Rule

On an up day, if today's volume exceeds the highest down-volume day of the prior 10 sessions, that's a Pocket Pivot.

Why 10 days?

Ten trading days (two weeks) captures the most recent selling activity. If buying volume exceeds the peak of recent selling, it means buyers have overwhelmed sellers — a shift in supply/demand dynamics.

Step-by-step detection:


Day -10 to Day -1: Record volume on each DOWN day
Find the maximum down-day volume = THRESHOLD

Day 0 (today):
  1. Is the stock UP today? → Yes
  2. Is today's volume > THRESHOLD? → Yes
  3. Is the stock near or above MA50? → Yes
  → POCKET PIVOT CONFIRMED

Position management after PP entry:

  • Stop-loss: Below the day's low OR below the 50-day MA (whichever is closer)
  • Typical risk: 3-7% from entry
  • Add rule: If the stock breaks out of the base after your PP entry, you can add to the position at the breakout point

口袋樞紐(PP) ── 完整解析

#### 起源

由吉爾·莫拉萊斯與克里斯·卡赫(Gil Morales、Chris Kacher)在《歐尼爾門徒這樣交易(Trade Like an O'Neil Disciple)》一書中提出。核心概念:法人在整理區間中所留下的成交量足跡,可以在實際突破之前先被偵測出來。

#### 規則

在某一上漲日,若當日成交量超過過去 10 個交易日中最大下跌日成交量,即構成口袋樞紐。

#### 為什麼用 10 天?

10 個交易日(約 2 週)能涵蓋最近期的賣壓。如果買進量已經超過近期賣壓的高峰,代表買方壓過了賣方 ── 也就是供需關係正在轉變。

#### PP 進場後的部位管理:

  • 停損: 設於當日低點下方,或 50 日均線下方(取較近者)
  • 典型風險: 自進場價算起 3-7%
  • 加碼規則: 若 PP 進場後個股正式突破整理區間,可在突破點進行加碼

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Buyable Gap-Up (BGU) — Deep Dive

Origin

William O'Neil identified gap-ups as one of the most powerful institutional signals. A stock that gaps up on massive volume after earnings or news is seeing a sudden, large-scale shift in institutional demand.

The Rules

Not every gap-up is buyable. The criteria:

  1. Gap size: Open at least 0.75× the 40-day ATR above the prior close (volatility-adaptive, not a fixed percentage)
  2. Volume: At least 150% of 50-day average volume
  3. Close position: Stock closes bullishly (close ≥ open) and the gap is not filled (day's low stays above prior high)
  4. Context: Stock is in an uptrend (price > MA50 > MA200)

The bullish close rule is critical

If a stock gaps up 5% but then sells off to close below its open, institutions are using the gap to sell into (distribution). Only gap-ups where buyers hold control all day (close ≥ open) are genuine accumulation events. Additionally, the gap must not be filled — the day's low must stay above the prior day's high.

Position management after BGU entry:

  • Entry: Buy during the gap day or the next day if the stock holds above the gap
  • Stop-loss: Below the low of the gap day
  • Gap as support: The gap area often becomes a support zone. If the stock pulls back to the gap level on low volume, it's actually a secondary entry opportunity
  • Typical risk: 4-8% from entry (wider than PP due to gap volatility)

可買入跳空(BGU) ── 完整解析

#### 起源

威廉·歐尼爾將跳空上漲視為法人最強烈的訊號之一。當個股在財報或重大消息後,以巨量跳空大漲時,代表法人需求出現急遽且大規模的轉變。

#### 規則

不是所有跳空都值得買進,條件如下:

  1. 跳空幅度: 開盤價較前一日收盤至少高出 40 日 ATR 的 0.75 倍(隨波動性自動調整,而非固定百分比)
  2. 成交量: 至少為 50 日均量的 150%
  3. 收盤位置: 當日收紅(收盤 ≥ 開盤),且缺口未被回補(當日最低價維持在前一日高點之上)
  4. 背景條件: 個股處於上升趨勢(股價 > MA50 > MA200)

#### 收紅 K 規則為什麼如此重要

如果一檔個股開高 5%,卻一路下殺到收盤跌破開盤,代表法人正在「利用跳空出貨」(分配出貨)。唯有買方一整天都掌握主導權(收盤 ≥ 開盤)的跳空,才是真正的籌碼累積事件。此外,缺口必須未被回補 ── 當日最低點必須仍在前一日高點之上。

#### BGU 進場後的部位管理:

  • 進場: 在跳空當日,或股價維持在缺口上方的次日進場
  • 停損: 跳空當日低點下方
  • 缺口轉為支撐: 缺口區常成為支撐帶。若股價以低量拉回缺口位置,反而是次要進場機會
  • 典型風險: 自進場算起 4-8%(因跳空波動性較大,停損幅度比 PP 寬)

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Undercut & Rally (U&R) — Deep Dive

Origin

This is a shakeout pattern recognized by many professional traders. Jesse Livermore wrote about it in the 1920s — the concept of "the shake" where weak holders are forced out before a major advance.

The Mechanism


Price
  |
  |     Prior Low (Support)
  |   - - - - - - - - - - - -
  |          ↓ Undercut
  |        \  /  ← Shakeout zone (1-3 days)
  |         \/
  |          ↑ Rally back ABOVE prior low
  |         /
  |        / ← Volume surge on rally
  |       /
  +------→ Time
  1. Stock approaches a known support level (20-day low, 50-day SMA, or 65-day EMA)
  2. It breaks BELOW that level — triggering stop-losses and fear selling
  3. The next day, it reverses sharply back ABOVE the level with a bullish candle (close ≥ open)
  4. No volume requirement — the price reversal itself confirms the shakeout trap

Why it works

The undercut removes the "weak hands" — traders with tight stops who sell on the breakdown. Once they're out, the selling pressure evaporates. Institutions that wanted to accumulate shares now have a pool of sellers to buy from at lower prices. The rally that follows often leads to a new leg up because overhead supply has been absorbed.

Position management after U&R entry:

  • Entry: Buy on the rally day as the stock moves back above the broken support level
  • Stop-loss: Below the undercut low (the lowest point of the shakeout)
  • Typical risk: 3-6% from entry (the undercut creates a clear, defined risk point)
  • Best setups: U&R at the base of a VCP, with declining volume into the undercut

跌破回升(U&R) ── 完整解析

#### 起源

這是許多專業交易者熟知的洗盤型態。傑西·李佛摩在 1920 年代就曾論及 ── 在大波段啟動之前,弱手會被先洗出場的「shake」概念。

#### 機制

  1. 個股逼近某個已知支撐(20 日低點、50 日 SMA、或 65 日 EMA)
  2. 跌破該支撐 ── 觸發停損與恐慌賣壓
  3. 隔天迅速反彈,重新站回該水準之上,並收紅 K(收盤 ≥ 開盤)
  4. 不要求成交量 ── 價格反轉本身就足以確認假跌破洗盤

#### 為什麼會有效?

假跌破會把「弱手」── 那些用緊密停損的交易者 ── 洗出場。一旦他們離場,賣壓就會立刻消退。原本想累積籌碼的法人,現在反而能在較低價位拿到一批被迫賣出的籌碼。後續的反彈往往帶動新一波上漲,因為上方賣壓已被吸收。

#### U&R 進場後的部位管理:

  • 進場: 在反彈當日,當股價站回被跌破的支撐之上時進場
  • 停損: 假跌破最低點(洗盤最低點)的下方
  • 典型風險: 自進場算起 3-6%(假跌破的低點本身就是清楚明確的風險點)
  • 最佳設置: VCP 整理區間底部出現的 U&R,且跌破過程伴隨成交量持續萎縮

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Comparing the Three Signals

FeaturePocket PivotBuyable Gap-UpUndercut & Rally
FrequencyMost commonLeast commonModerate
Typical risk3-7%4-8%3-6%
Win rate~55-60%~65-70%~60-65%
Best forEarly entries inside basesEarnings reactionsCounter-trend entries
Volume signatureExceeds 10-day down max + ≥1.5× 50d avg150%+ of averageNo volume requirement
RequiresAbove MA50 (or within 3% of MA200)Gap ≥ 0.75× ATR + uptrendBreak below 20d low/MA50/EMA65 + next-day recovery
Reward potentialModerate (entering early)High (momentum ignition)High (shakeout reversal)

三大訊號比較

特性口袋樞紐可買入跳空跌破回升
出現頻率最高最低中等
典型風險3-7%4-8%3-6%
勝率約 55-60%約 65-70%約 60-65%
適用情境整理區間內的早期進場財報反應逆勢進場
量能特徵超過 10 日下跌量峰值 + ≥1.5× 50 日均量均量的 150% 以上不要求成交量
必要條件站上 MA50(或 MA200 的 3% 內)跳空 ≥ 0.75× ATR + 上升趨勢跌破 20 日低點/MA50/EMA65 + 隔日收復
報酬潛力中等(進場較早)高(動能點火)高(洗盤反轉)

訊號與其他篩選機制的組合運用

每個訊號都能透過搭配其他篩選器,提升信心度:

信心度最高的設置:

  1. RS 90+ 的個股、在 VCP 內出現 PP: 你正在「整理區間還沒突破」的時刻買進領先股 ── 這正是專業交易者的 edge。
  2. CANSLIM 10+ 個股出現 BGU: 基本面與技術面雙重契合,加上明確觸媒。當好公司公布好業績、跳空大漲,法人會大舉湧入。
  3. 量縮後 VCP 整理區間底部出現的 U&R: 洗盤把最後的賣方都洗出去,個股已蓄積最大位能,準備迎接突破。

Combining Signals with Other Screens

Each signal becomes higher conviction when paired with additional filters:

Highest conviction setups:

  1. PP inside a VCP with RS 90+: You're buying a leader inside a tight base, before the crowd sees the breakout. This is the professional trader's edge.
  1. BGU on a CANSLIM 10+ stock: Fundamental + technical alignment with a catalyst. When great companies report great earnings and the stock gaps up, institutions are piling in.
  1. U&R at the base of a VCP after volume dry-up: The shakeout clears the last sellers, and the stock is now coiled for a breakout with maximum potential energy.

FAQ

Can a stock trigger multiple signal types on the same day?

Rarely, but yes. A BGU can simultaneously qualify as a PP if the gap-up volume also exceeds the 10-day down-volume maximum. When this happens, it's an exceptionally strong signal.

What if I miss the entry signal by one day?

For PP: buying the next day is acceptable if the stock is within 1-2% of the signal day's close. For BGU: buying within 1% of the gap level is still viable. For U&R: the rally day itself is the entry — don't chase more than 2% above the recovery level.

How many signals should I act on per week?

Depends on your portfolio size and risk tolerance. A focused momentum trader typically holds 5-10 positions. During strong markets, you might see 3-5 high-quality signals per week across 4 markets. During corrections, you might see zero.

同一個股可能在同一天觸發多種訊號嗎?

雖少見,但確實會。如果跳空當日的成交量同時超過過去 10 日的最大下跌量,BGU 也會同時符合 PP 的條件。當這種情況發生時,訊號特別強勁。

如果我晚一天才看到進場訊號?

PP: 若股價在訊號日收盤價的 1-2% 以內,隔天進場仍可接受。BGU: 在跳空價位 1% 以內仍可進場。U&R: 反彈日本身就是進場時機 ── 不要在收復價位上方 2% 以外追進。

我每週應該對多少訊號採取行動?

取決於你的部位規模與風險承受度。集中型動能交易者通常持有 5-10 個部位。在強勢市場中,4 個市場每週可能會出現 3-5 個高品質訊號。在修正期間,可能完全沒有任何訊號。


This content is for educational and informational purposes only. It does not constitute financial advice, investment recommendations, or solicitation to buy or sell securities.
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