Diving Board

Core idea

The diving board is a chart pattern Bulkowski discovered himself on Thanksgiving Day, 2010, while shopping for stocks on the weekly scale. Its signature: a flat horizontal base (the board) lasting weeks to months, followed by a sharp plunge (the plunge), followed by a recovery. The trade is the close above the top of the board on the way back up — that's the breakout that signals the stock has recovered and is about to move higher.

Average rise after breakout is 73% on the weekly scale (median 42%), with only 4% of patterns failing to rise even 5%. That's an extraordinary statistical profile, but with caveats: the numbers are weekly-scale (not directly comparable to daily-scale chart patterns), most patterns take ~15 months to reach the ultimate high, and the percentage meeting price targets is just 62% — meaning the tall pattern height makes targets harder to hit than the low failure rate suggests.

Bulkowski's framing: "I switch to the weekly charts and search for diving board patterns. They represent good value with the potential for long-term appreciation. But they are not low risk."

Why it matters

Most chart patterns work best when momentum is already aligned. The diving board works when momentum has failed — the plunge is the failure event, and the pattern asks the trader to identify stocks whose underlying business hasn't broken down even though the chart has. That's structurally a value approach dressed up as technical analysis.

This makes the pattern useful at exactly the moments most charting patterns are useless: late-cycle markets where new highs are scarce and overvalued. The pattern thrives during bear-market bottoming, during sector-specific drawdowns, and during post-shock recoveries (Covid-19 produced an entire crop of them).

Why the weekly scale matters

Bulkowski explicitly limits the diving board to weekly charts. The reasoning is structural: the board must be long enough to act as durable support, and that means weeks-to-months on the daily scale, which collapses into a clean horizontal line on the weekly view. Daily-scale "boards" are usually just rectangles or congestion zones — a different pattern with worse statistics.

How it relates to the cloudbank

The diving board shares its silhouette with the cloudbank pattern but is shorter and has no minimum-drop requirement. A cloudbank requires a 40%+ plunge; a diving board accepts plunges as small as single-digit percentages. Trade-off: cloudbanks have bigger eventual moves but are rarer; diving boards are more frequent but with more variable outcomes.

Key takeaways

Mental model

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Practical application

Example

A mid-cap industrials stock trades between $44 and $48 for nine months on the weekly chart — a clean flat base with the lower support at $44 touched five times. In late March, a sector-wide downgrade triggers a four-week plunge to $32 on heavy volume. Plunge depth: 27%, well above the 14% median.

For the next two months, price stair-steps up — $34, $36, $38, $41. The investor monitors the recovery but does not buy. The breakout level is $48 (the top of the original board), not $44 (the bottom). On week 14 of the recovery, the stock closes the week at $48.40, above the board top, on the highest weekly volume in 18 months. Breakout confirmed.

The investor buys at $48.40 with a stop at $40.50 (just below the most recent swing low). Over the next 14 months, price rises in three legs to $79 — a 63% gain, close to the 73% average but below the median of 42% which is sometimes the better statistic to anchor on. The investor scales out as the move extends, exiting fully at $74.

Two judgments made this trade work: (a) refusing to buy during the recovery before the breakout — most recoveries stall, and (b) waiting for the weekly close above $48, not just an intraday spike. Diving boards trade on weekly closes, full stop.

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