PRTA Stock Analysis: Buy, Sell, or Hold?
PRTA - Prothena Corporation plc Ordinary Shares
$9.27
-0.18 (-1.90%)
▼
5d:
+4.39%
30d:
+5.94%
90d:
-5.7%
WAIT
LOW Confidence
Analysis Updated: Aug 21, 2026 12:00 AM ET
Earnings: Aug 03, 2026
0d
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Interactive Price Chart (1 Month)
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Bottom Line:
📊 MIXED SIGNALS: PRTA shows conflicting indicators. Wait for confirmation before entering.
📊 MIXED SIGNALS: PRTA shows conflicting indicators. Wait for confirmation before entering.
In-depth Analysis How we analyze
Valuation Analysis: PRTA is currently trading at $9.27, which is considered extended relative to its 30-day fair value range of $8.44 to $9.10. From a valuation perspective, the stock is trading at a discount (Forward PE: -5.9) compared to its historical average (18.0). At these levels, the market is pricing in 0% annual earnings growth. This growth rate appears achievable given the company's track record, suggesting the valuation is rational.
Technical Outlook: Technically, PRTA is in a strong uptrend. The price is approaching resistance at $9.52. A breakout above this level would be a bullish signal, while rejection here could lead to consolidation.
Market Sentiment: PRTA scores 23/100 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 $21.40 (+137.0%). Current signals suggest waiting for a better entry point before initiating new positions.
Technical Outlook: Technically, PRTA is in a strong uptrend. The price is approaching resistance at $9.52. A breakout above this level would be a bullish signal, while rejection here could lead to consolidation.
Market Sentiment: PRTA scores 23/100 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 $21.40 (+137.0%). Current signals suggest waiting for a better entry point before initiating new positions.
Quick Decision Summary
Current Position
EXTENDED
Historical Trading Range
$8.44 -
$9.10
Company Quality Score
44/100
(HOLD)
Options IV Signal
32th percentile
(NORMAL)
Volume Confirmation
HIGH
Confidence Score
40.4%
Protect Your Profits
Holding PRTA? Use our AI-powered strategies to protect your downside while keeping your long-term position.
View Profit Protection PlanAll Signals
- BEARISH: Price extended above range
- NEUTRAL: Options fairly priced (IV 32th percentile)
- BEARISH: Weak technical setup (23/100)
- BULLISH: High volume confirmation
- BULLISH: Trading 137.0% below Wall St target ($21.40)
- BULLISH: Market expects only 0% annual growth - appears undervalued
- WARNING: Composite score 44/100 in the bottom quintile — this cohort historically lags the market
Trading Range Analysis
30-Day Trading Range
$8.44 -
$9.10
Current vs Trading Range
EXTENDED
Expected Move (7 Days)
±$1.03
(11.1%)
Support & Resistance Levels
Support Level
$8.53
Resistance Level
$9.52
Current Trend
Strong Uptrend
Technical data as of
Aug 21, 2026
Fundamental Context
Forward P/E (Next Year Est.)
-5.94
Wall Street Target
$21.40
(+137.0%)
Revenue Growth (YoY)
-77.1%
Profit Margin
-80.7%
PE vs Historical
-5.9 vs 18.0
CHEAP
Share & Embed Analysis
Last updated: August 24, 2026 11:39 AM ET
Data refreshes hourly during market hours. Next update: 12:39 PM
Data refreshes hourly during market hours. Next update: 12:39 PM
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Technical Signals Check
Is PRTA showing a specific setup today?
Insider Activity (6 Months)
0
Buys
0
Sells
0
Net
NEUTRAL
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Advanced PRTA Option Strategies
Professional options setups generated by AI based on today's PRTA price and gamma walls.
