PRTA
Prothena Corporation plc Ordinary Shares
PHARMACEUTICAL PREPARATIONS
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PRTA Stock Analysis: Buy, Sell, or Hold?
$8.23
-0.50 (-5.73%)
âŧ
5d:
+4.31%
30d:
-1.67%
90d:
-7.11%
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Earnings: Nov 05, 2026
0d
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Updated Nov 12, 12:00 AM ET
QUANTITATIVE VERDICT
WAIT
LOW Confidence (65%)
Quality Score
46/100
Position
SLIGHTLY LOW
30-Day Fair Range
$8.15 â $8.71
Position: SLIGHTLY LOW
Forward P/E & Valuation
-6.3x
CHEAP
vs 18.0x historical avg
Wall Street Target
$21.40
+160.0% upside
Options IV & Volume
HIGH Vol
HIGH volume confirmation
Support / Resistance
$7.79 / $8.90
Trend: Strong Uptrend
Executive Thesis & Bottom Line
Forward Earnings Fair Value & Price Prediction →
âšī¸ NEUTRAL: PRTA is fairly priced but lacks strong directional signals. At 0% expected growth, valuation appears cheap. Wait for clearer setup or better entry on dips.
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Interactive Price Chart (1 Month)
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In-depth Analysis How we analyze
Valuation Analysis: PRTA is currently trading at $8.23, which is considered slightly low relative to its 30-day fair value range of $8.15 to $8.71. From a valuation perspective, the stock is trading at a discount (Forward PE: -6.3) 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. Immediate support is located at $7.79, while resistance sits at $8.90. Short-term momentum is weak, with the stock down 5.7% recently.
Market Sentiment: PRTA scores 25/100 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. In the options market, Implied Volatility is low (0th percentile), suggesting options premiums are relatively cheap. This makes it an attractive time for long options strategies if you have a directional bias. Wall Street analysts see significant upside, with an average price target of $21.40 (+160.0%). Current signals suggest waiting for a better entry point before initiating new positions.
Technical Outlook: Technically, PRTA is in a strong uptrend. Immediate support is located at $7.79, while resistance sits at $8.90. Short-term momentum is weak, with the stock down 5.7% recently.
Market Sentiment: PRTA scores 25/100 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. In the options market, Implied Volatility is low (0th percentile), suggesting options premiums are relatively cheap. This makes it an attractive time for long options strategies if you have a directional bias. Wall Street analysts see significant upside, with an average price target of $21.40 (+160.0%). Current signals suggest waiting for a better entry point before initiating new positions.
Quick Decision Summary
Current Position
SLIGHTLY LOW
Historical Trading Range
$8.15 -
$8.71
Company Quality Score
46/100
(HOLD)
Volume Confirmation
HIGH
Confidence Score
65.4%
Trading Range & Key Levels
30-Day Trading Range
$8.15 -
$8.71
Current vs Trading Range
SLIGHTLY LOW
Expected Move (7 Days)
Âą$0.54
(6.6%)
Support Level
$7.79
Resistance Level
$8.90
Current Trend
Strong Uptrend
Technical data as of
Nov 12, 2026
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View Profit Protection PlanQuantitative Signal Breakdown
- BULLISH: Price oversold vs 30-day range
- BULLISH: Options cheap (IV 0th percentile)
- BEARISH: Weak technical setup (25/100)
- BULLISH: High volume confirmation
- BEARISH: Downward momentum (-5.7%)
- BULLISH: Trading 160.0% below Wall St target ($21.40)
- BULLISH: Market expects only 0% annual growth - appears undervalued
- WARNING: Composite score 46/100 in the bottom quintile â this cohort historically lags the market
Fundamental Context
Forward P/E (Next Year Est.)
-6.26
Wall Street Target
$21.40
(+160.0%)
Revenue Growth (YoY)
-74.3%
Profit Margin
-45.4%
PE vs Historical
-6.3 vs 18.0
CHEAP
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bloggers & journalists: you are free to use our charts with attribution.Reddit & Retail Trader Sentiment (PRTA)
Bullish
2 Retail Mentions
Reddit / WSB Comments
1
Bullish
StockTwits Volume
1 msgs
24h retail stream
Last Tracked
Nov 11, 2026
Daily AI digest
AI Retail Discussion Summary:
A bullish StockTwits message expresses strong support for $PRTA, despite the lack of recent news.
Key Retail Themes:
Strong investor conviction
Lack of news impacting sentiment
Aggregated from r/wallstreetbets, r/stocks & StockTwits streams.
View All Trending Reddit & WSB Stocks →
Last updated: November 12, 2026 8:56 PM ET
Data refreshes hourly during market hours. Next update: 9:56 PM
Data refreshes hourly during market hours. Next update: 9:56 PM
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Technical Signals Check
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Insider Activity (6 Months)
0
Buys
0
Sells
0
Net
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Advanced PRTA Option Strategies
Professional options setups generated by AI based on today's PRTA price and gamma walls.
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