What is a long wick or a tiny body telling you?
Three of the most-cited single-candle shapes all come from the same family — they're about wicks and the absence of a body.
- Hammer — a small body near the top of the range with a long lower wick. Sellers pushed the price well down during the session; buyers absorbed it and drove the close back up near the high.
- Shooting star — the mirror at the top of a move: a small body near the low with a long upper wick. The price reached up and was pushed back.
- Doji — open and close at essentially the same price, so the body is a line. Whatever happened intraday, the session ended exactly where it began.
The behaviour: rejected prices
A long wick is the market saying we visited that price and it didn't hold. Someone was willing to transact down at the low, and someone else was willing to take the other side in enough size to lift the price back before the close.
That's a real, observable event about where liquidity showed up. The hammer's long lower wick is a genuine record that demand appeared at those prices on that day. What it does not record is whether that demand had any more size behind it, or whether it was a single participant finishing an order.
A doji is the most easily over-interpreted of the three. The traditional gloss is "indecision" — a balanced fight. Sometimes true. Just as often, it's thin trading: in a stock that trades 40,000 shares a day, a matching open and close is more likely an absence of trading than a psychological standoff.
A worked example
Rounded and illustrative: open $30.20, low $27.50, high $30.40, close $30.00. The body spans $30.00–$30.20 — trivially small. The lower wick runs 9% of the price.
Read it as: the price traded 9% below where it opened and finished within 1% of the open. Then immediately ask the context questions: was that 9% wick unusual for this stock, or normal? Was volume heavy or light? Was there a news release that hit and got reversed?
That session is the middle one below, with its mirror and a body-less bar beside it. Look at where the figure ends relative to the long-lower-wick bar before you decide what the shape was worth.
The scaling trap
Wick length is meaningless in absolute terms. A 2% lower wick is a genuinely dramatic session for a large utility whose daily range is usually 0.6%. The same 2% wick on a small-cap biotech that routinely swings 8% intraday is an ordinary Tuesday.
This is why practitioners compare candle features to the instrument's own recent range — the average true range habit from the indicators course. "Long wick" always means long relative to this stock's normal, and a pattern definition that doesn't normalise for volatility is comparing different things to each other.
The honest limit
A single candle is the weakest evidence in this entire course. One session, four numbers, all context discarded. Every serious treatment of candlesticks — including the traditional ones — insists that these shapes are read in context: where in a trend, on what volume, relative to what range. Stripped of context, a hammer is a description of one day, nothing more.
Try it now
- Measure the three marked bars on the schematic: wick length as a multiple of the body, and body as a share of range. Then note where the last bar of the figure sits relative to the long-lower-wick one. The shape was textbook and it led nowhere, and that is drawn rather than asserted.
- Now normalise before you judge. Find a session in the month below whose lower wick is at least twice its body, then divide that wick by the 14-day ATR for the same date, read off the pane under the chart. "Long" only ever means long relative to this instrument's own normal.
- Failure hunt: find a textbook hammer at what looked like a low, after which price kept falling for another two weeks. Note how identical it looks to one that "worked" — because at the time, it was identical.