CSTL Stock Analysis: Buy, Sell, or Hold?
CSTL - Castle Biosciences, Inc. Common Stock
$34.20
1.27 (3.86%)
▲
5d:
+15.46%
30d:
+34.22%
90d:
+66.5%
WAIT
LOW Confidence
Analysis Updated: Aug 21, 2026 12:00 AM ET
Earnings: Jul 30, 2026
0d
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Interactive Price Chart (1 Month)
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Bottom Line:
📊 MIXED SIGNALS: CSTL shows conflicting indicators. Wait for confirmation before entering.
📊 MIXED SIGNALS: CSTL shows conflicting indicators. Wait for confirmation before entering.
In-depth Analysis How we analyze
Valuation Analysis: CSTL is currently trading at $34.20, which is considered extended relative to its 30-day fair value range of $24.62 to $31.63.
Technical Outlook: Technically, CSTL is in a uptrend. The price is approaching resistance at $34.70. A breakout above this level would be a bullish signal, while rejection here could lead to consolidation. The stock is showing strong short-term momentum, up 3.9% recently.
Market Sentiment: CSTL scores 15/100 on our bottoming-setup gauge. Note this measures entry quality, not trend direction — a low score can mean the chart is extended after a strong run (don't chase) or still falling without stabilization; better entries typically come after a pullback toward the 20-day average. Wall Street analysts see significant upside, with an average price target of $44.00 (+28.7%). Current signals suggest waiting for a better entry point before initiating new positions.
Technical Outlook: Technically, CSTL is in a uptrend. The price is approaching resistance at $34.70. A breakout above this level would be a bullish signal, while rejection here could lead to consolidation. The stock is showing strong short-term momentum, up 3.9% recently.
Market Sentiment: CSTL scores 15/100 on our bottoming-setup gauge. Note this measures entry quality, not trend direction — a low score can mean the chart is extended after a strong run (don't chase) or still falling without stabilization; better entries typically come after a pullback toward the 20-day average. Wall Street analysts see significant upside, with an average price target of $44.00 (+28.7%). Current signals suggest waiting for a better entry point before initiating new positions.
Quick Decision Summary
Current Position
EXTENDED
Historical Trading Range
$24.62 -
$31.63
Company Quality Score
33/100
(SELL)
Volume Confirmation
HIGH
Confidence Score
26.3%
All Signals
- BEARISH: Price extended above range (+8.1% above its trading range)
- BEARISH: Weak technical setup (15/100)
- BULLISH: High volume confirmation
- BULLISH: Strong upward momentum (+3.9%)
- BULLISH: Trading 28.7% below Wall St target ($44.00)
- WARNING: Composite score 33/100 in the bottom quintile — this cohort historically lags the market
Trading Range Analysis
30-Day Trading Range
$24.62 -
$31.63
Current vs Trading Range
EXTENDED
Support & Resistance Levels
Support Level
$28.72
Resistance Level
$34.70
Current Trend
Uptrend
Technical data as of
Aug 21, 2026
Fundamental Context
Forward P/E (Next Year Est.)
-34.58
Wall Street Target
$44.00
(+28.7%)
Revenue Growth (YoY)
20.1%
Earnings Growth (YoY)
-51.6%
Profit Margin
-5.4%
Share & Embed Analysis
Last updated: August 22, 2026 11:03 PM ET
Data refreshes hourly during market hours. Next update: 12:03 AM
Data refreshes hourly during market hours. Next update: 12:03 AM
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Technical Signals Check
Is CSTL showing a specific setup today?
Insider Activity (6 Months)
0
Buys
10
Sells
Net
INSIDERS SELLING
Recent Transactions
Derek J Maetzold
SELL
3622 shares
2026-04-21
Derek J Maetzold
SELL
550 shares
2026-04-21
Derek J Maetzold
SELL
6214 shares
2026-04-06
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