What is Hammer?

A Hammer is a single-candlestick price pattern seen on a chart. In forex, it is typically described using candle shape: a relatively small real body near the upper part of the candle range, plus a noticeably long lower wick (also called a lower shadow). The basic idea is that, during the candle, price moved down far enough to create the lower wick, then later recovered toward the candle’s open/upper area.

How does Hammer work in forex?

Hammer is not an indicator with a fixed formula; it is a visual characterization of how one period’s trading range unfolded. When people refer to a “Hammer,” they usually mean these parts of the candle:

Real body: The range between open and close. A Hammer is commonly described as having a small body.
Lower wick: The distance from the body’s lower edge down to the period’s low. A Hammer is commonly described as having a long lower wick.
Upper wick: The distance from the body’s upper edge to the period’s high. A Hammer is often described as having little or no upper wick.

Assumption for the description: you are looking at a standard candlestick chart where each candle represents a fixed time interval (for example, 5 minutes or 1 hour). Under that assumption, the Hammer shape means the market tested lower prices and then closed higher (relative to the low) within the same interval.

How it’s used in reasoning (without treating it as a promise): a Hammer can be interpreted as a sign of selling pressure that lost strength during that candle. Whether that leads to any sustained change depends on what happens next and on conditions that vary from market to market.

Evidence or example: candle shape and what to check

Here is a practical, verifiable example of what you can look for on your own charts (no live data needed). Choose two recent candles after a noticeable downward move:

Candle A: shows a small body near the top of its range, with a clear long lower wick.
Candle B: is similar but has a much less pronounced lower wick or closes near the low (so the body is not small and near the top).

If you compare these visually, Candle A matches the common “Hammer” description more closely because the lower wick is longer relative to the body, which indicates a deeper intraperiod low followed by recovery.

What to verify beyond shape:

Follow-through: does the next candle(s) show continued recovery or does price stall immediately?
Location: is the Hammer occurring after a meaningful decline, or is it appearing mid-range where it may be less informative?
Overlap: do nearby candles’ ranges overlap heavily, making the “long wick” less distinctive?

Limitations and risks

A Hammer can fail even when the candle looks correct. Material limitations include:

It is not predictive by itself: the pattern describes one period’s price structure, not future order flow.
Context matters: the same shape can appear in unrelated parts of a range, and meaning can change with market regime.
Disagreement on strict definitions: different charters use slightly different thresholds for what “long” and “small” mean, so classifications can vary.
Follow-through may be absent: you can get a Hammer-like candle, yet the move continues downward if demand does not materialize afterward.
Costs and execution effects: even if you interpret the candle correctly, real outcomes depend on spreads, slippage, and the rules of your specific execution environment.

Outcomes vary with market conditions, costs, execution, and jurisdiction. Historical relationships do not establish future results.

Verification or next question

To independently verify Hammer behavior, review multiple instances on the specific timeframe and instrument you care about. Track what happened in the candles after each Hammer-like candle, and note how often any subsequent recovery followed versus when the move reversed back down. A useful next question is: which definition threshold are you using (body size and wick length), and how sensitive are your observations to that choice?