Encyclopedia of Chart Patterns. Thomas N. Bulkowski

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energy barrier at the price of I. As I left his house, I started whistling the Voyager theme song.

      The stop covered his position at G for a loss of 3.42 a share, not including commissions.

      What did Justin do wrong? I think he should have anticipated a pullback at the energy barrier (the knot at the price of I). After that, though, I would have expected the stock to resume the downward move to H. Table 6.4 says that 60% of the time, price does resume the downward move. Fortunately he had a stop in place to protect his backside while he waited for the Voyager crew to rescue him.

Schematic illustration of Big W.

      RESULTS SNAPSHOT

      Appearance: Price forms twin bottoms at or near the same price with an unusually tall left side, often looking like a big W.

       Upward Breakouts

Bull Market Bear Market
Reversal or continuation Long‐term bullish reversal Short‐term bullish reversal
Performance rank 11 out of 39 8 out of 20
Breakeven failure rate 9% 9%
Average rise 46% 30%
Volume trend Downward Downward
Throwbacks 64% 66%
Percentage meeting price target 74% 55%
See also Bearish bat, double bottoms (all varieties)

      A big W is nothing more than a double bottom with a tall left side. It might have a tall right side, too, but that depends on how well the stock performs after an upward breakout. If price doesn't break out upward, then it's not a big W. I'll discuss identification guidelines later.

      If you use the full height of the pattern in the measure rule computation, price will reach the target 55% to 74% of the time (bear, bull markets, respectively).

      Let's look at examples of big Ws.

      Figure 7.1 shows what a big W looks like. The pattern has the first bottom at B, the second one at D, with a hill in between, C. The pattern confirms as valid when price closes above the top of the hill.

      The left side of the pattern begins at A, which is what I call the launch price. The stock drops in a straight‐line run down to the first bottom of the big W.

      After the big W forms the second bottom, price recovers. In this example, the stock rises to E in a quick sprint higher from the low at D. That's still well short of the launch price, A. After point E, the stock is like a speedboat pulling a water skier. You get a lot a thrust to get the skier on top of the water (to E) and then the boat planes out (on the way to F). It's possible that the stock will recover and post a new ultimate high, so F is tentative until more data arrives.

      Volume (G) has a U‐shape (in this example) until the spike at D. Linear regression says volume trends upward from bottom to bottom, so that's why I drew the line sloping higher at G. Volume for the big W trends downward most often, though.

Graph depicts the big W sees price rise, but not very far.

      Table 7.1 shows identification guidelines for the big W and refer to Figure 7.2 for guidance.

Characteristic Discussion
Appearance Price forms twin bottoms at or near the same price with an unusually tall left side. A well‐formed pattern should remind you of a big W (that is, if price on the right side rises to match the left).
Price trend Downward, leading to the first bottom. Look for a long, steep drop often at least the height of the pattern (from the lower of the two valleys to the peak between the valleys) above the top of the pattern. See text.
Volume Downward the majority of the time, but don't exclude a big W with a rising volume trend.
Breakout direction, confirmation To break out, price has to close above the peak between the two bottoms, confirming the pattern as valid. Without an upward breakout, you don't have a big W.
Duration No minimum duration and the longest pattern I studied is about 9 months wide.
Graph depicts the Price at F almost returns to the launch price, A.

      Price trend. The downtrend from A to B is a steep drop like that shown in the figure. You want to avoid patterns that see price meander or even move sideways as the drop approaches B. If price takes its time reaching the first bottom, then the chart pattern is probably a double bottom (see one of the Adam & Eve varieties).

      Eyeball the height from the center peak between the two bottoms to the lower of the two bottoms. Then make sure the left side of the pattern is at least that height above the central peak.

      For example, the height of the big W is the high

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