Decline depth
-25.6%
From rolling 252-day high of $44.28, 206d ago.
Past the 20% Watch threshold.
WatchRecovering
CSTLCastle Biosciences, Inc.
Healthcare · Diagnostics & Research · small-cap ($725M)
-25.6%
from rolling 252-day high of $44.28 set 2026-01-26 · 206d ago
Current
$32.93
Decline depth
-25.6%
Decline σ
1.1σ
TFC
2/5 bearish
Rolling 252-day high
Up day
Down day
Last 90 trading days · data from Alpaca
Since it joined the list
$CSTL landed on the list 2026-03-02, down 36.8% from its 52-week high that day — now down -25.6%.
It has clawed back 14.0 percentage points off that level. It bottomed 59.0% below that high along the way.
Decline from the 52-week high as it stood on 2026-03-02 (fixed anchor) → today. Split-adjusted, Alpaca. Observed history, not a forecast.
Structural break signals
CSTL qualifies for the Watch on decline depth.
Time-frame continuity
2/5 bearish
Latest bar across daily/weekly/monthly/quarterly/yearly time frames. A bar counts as bearish when it's a 2-Down or a red 3.
Decline sigma
1.1σ
Drop from local high over the last 5 bars, expressed in units of the stock's typical daily volatility (4.44% per day).
The structural read
What price action says about CSTL.
CSTL qualifies for the Watch on decline depth — down -25.6% from its rolling 252-day high.
Alongside that decline, our proprietary engine has flagged a confirmed bullish structural signal on one or more time frames — moderate or strong time-frame-continuity (TFC) alignment — so the ticker also carries a Recovering badge. The two readings coexist: the tier tells you how deep the damage is, the Recovering badge tells you whether momentum may be turning. Recovering is not a buy signal; it's a structural read.
Broken Stocks stops here — it flags the structure, it doesn't build the upside case. Working out whether CSTL's turn is investable is what our sister tool does: ConvictionEdge — triple-engine conviction research on names showing a recovery signal.
Upstream TFC read: strong alignment, current phase monthly. Last bar types — daily 2U (green), weekly 3 (green), monthly 2U (green).
Earnings on file: 2026-07-30. Tiering is unaffected by earnings dates — listings reflect price structure only.
Questions about CSTL
What people ask.
Why is CSTL on Broken Stocks?
CSTL qualifies for the Watch on decline depth. It is down -25.6% from its rolling 252-day high of $44.28, set on 2026-01-26 — 206d ago. It additionally carries a Recovering badge — see below.
What does the Recovering badge mean for CSTL?
Recovering means our proprietary engine has flagged a confirmed bullish structural signal on one or more time frames (moderate or strong time-frame continuity). It coexists with the decline tier — CSTL is still Watch because the rolling-252-day decline hasn't healed, but a bullish setup has formed inside that decline. The two readings answer different questions: the tier tells you how deep the damage is; the Recovering badge tells you whether momentum may be turning. It's not a buy recommendation.
Is CSTL a falling knife?
No. The falling-knife label usually implies a steep, severe drop — typically 30% or more from a fresh high. CSTL is down -25.6% from its 52-week high, which qualifies for the Watch tier but is shallower than the falling-knife pattern. It's an early-stage decline rather than a sharp breakdown.
Is CSTL a buy?
Broken Stocks does not issue buy or sell recommendations. The list is a rules-based technical warning system. It tracks structural decline depth and recency — not company quality, management, fundamentals, or news. Always do your own research and consult a licensed advisor.
Where is CSTL trading inside its 52-week range?
At $32.93, CSTL sits 61.8% of the way from its 52-week low ($14.59) to its 52-week high ($44.28). A reading below 25% indicates price is hugging the bottom of the range; above 75%, the top.
How fast has CSTL been declining?
The current 25.6% decline accrued over 206d, which annualizes to roughly -45.4% per year. Annualized pace is a sanity check — a 30% decline in three months is a different signal than a 30% decline over two years.
How does CSTL compare to its sector?
There are 143 other Healthcare tickers on Broken Stocks: 70 Red, 35 Amber, 38 Watch, with 49 showing recovering structural signals. Median sector decline is -36.1% — CSTL's decline is shallower than the sector median.
Does CSTL's earnings date affect its tier?
No. Tiering is decided purely by decline depth and recency of the rolling-high date. The earnings date on file (2026-07-30) is shown for reference only — listings can move tier between scans based on closing prices, regardless of fundamentals or news events.