PRTA Forecast — Price Prediction for 2025. Should I Buy PRTA?
1-Day-Price-Prediction
-1.14%
1-Week Prediction
-0.65%
1-Month Prediction
+5.19%
2026 Prediction
-100%
2030 Prediction
-100%
Based on our advanced algorithm, we predict that PRTA stock price will experience significant movement in the coming periods. Our 1-day prediction estimates a price of $9.86, while the 1-week outlook suggests a value of $9.91. For the 1-month forecast, we project a price of $10.49. Looking further ahead, our 2026 projection estimates a value of $0.00, with a long-term 2030 forecast reaching $0.00. Stay informed and make strategic decisions with our data-driven insights!
Should I Buy Prothena Corporation PLC Stock?
Based on our evaluation of the five key dimensions—Technical Signals, Moving Average trends, Short Sell Data, Similar Chart Pattern Matching and Seasonality Analysis—we have identified the following insights. PRTA has several negative signals and is within a falling trend, so we believe it will perform weakly in the next couple of days or weeks. We therefore hold a negative evaluation of this stock. Our analysis conclusion for this stock is a Strong Sell candidate.
PRTA stock price ended at $9.97 on Monday, after losing-3.76%
The Prothena Corporation PLC stock price decreased by -3.76% on the last trading day (15 Dec 2025), dropping from 10.37 to 9.97. Throughout the last trading session, the stock experienced a fluctuation of 5.63% , ranging from a day low of $9.94 to a day high of 10.5. The price has declined in 6 of the last 10 days, resulting in a total change of -2.92% during this period. On the last day, trading volume increase by 374.95K shares, with the falling prices. This could serve as an early warning, indicating that risk may slightly increase in the coming days. In total, 852.65K shares were traded, amounting to approximately 8.61M.
PRTA Technical Signals
PRTA(Prothena Corporation PLC Corp) has 2 buy signals and 6 sell signals now. The current trend is an uptrend starting from 2025-12-10. The total price change during this trend is +1.01%. Recently, the price has dropped while volume increased, indicating a strong bearish signal. The average turnover of PRTA over the last 5 trading days is 7.12M. Overall, the technical indicator signals lean more toward a Bearish outlook in the mid-term.
PRTA Moving Average Analysis
Prothena Corporation PLC's overall moving average trend leans more bearish as of Tuesday, December 16, 2025, with 2 negative signals and 2 positive signal. In the mid-term, the SMA_20 being above the SMA_60 signals a strong bullish trend. There will be some resistance from the lines at $11.76, and $12.48. A break-up above any of these levels will issue buy signals. There will be some support from the lines at $9.44, and $8.72. A break-down below any of these levels will issue sell signals.
PRTA Short Selling Analysis
The short sale ratio of Prothena Corporation PLC(PRTA) as of 10 Dec 2025 is 12.64%, dropping from last trading day. With decreasing price from 10.32 to 9.87. The short sell activity indicate that short sellers may be anticipating price hit a bottom.
Technical Signal
Technical Signals Summary
Sell
6
Buy
2
Moving Average
Swing
Negative
Stock Price Below SMA_5
Short Term
Negative
SMA_5 Below SMA_20
Mid Term
Positive
SMA_20 Above SMA_60
Long Term
Negative
SMA_60 Below SMA_200
Short Selling
Close Price
Short Sale Ratio
Short Sale Volume
2 Bullish Signals
2 Bullish Signals
When Value satisfies Signal, Indicator signals Bullish
Indicators
Signal
Value
Meaning
Indicators
Signal
Value
Meaning
Moving Average Convergence Divergence (12, 26, 9)
MACD_12_26_9 > 0
0.00628
Bullish
Williams %R (14 days)
WILLR_14 < -80
-85.106
Bullish
6 Bearish Signals
6 Bearish Signals
When Value satisfies Signal, Indicator signals Bearish
Indicators
Signal
Value
Meaning
Indicators
Signal
Value
Meaning
Awesome Oscillator (5, 34)
AO_5_34 < 0
-0.251
Bearish
Momentum (10 days)
MOM_10 < 0
-0.3
Bearish
Moving Average
Price crosses below 5-day SMA
--
Bearish
Moving Average
Price crosses below 60-day SMA
--
Bearish
Moving Average
Price crosses below 250-day SMA
--
Bearish
Moving Average
5-day SMA crosses below 60-day SMA
--
Bearish
PRTA Stock Forecast
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
Month
Min. Price
Avg. Price
Max. Price
Potential ROI
In 2026, Prothena Corporation PLC (PRTA) is anticipated to change hands in a trading channel between $0.00 and $0.00.
Prothena Corporation PLC Stock Forecast 2026
PRTA Price Prediction & Forecast by Similar Chart Analysis
Based on historical patterns and backtesting of stocks with similar movements to Prothena Corporation PLC(PRTA), our algorithm predicts PRTA's 1-month price at $10.66, with an -0.83%downwardshift. Using a similarity score up to 95.99%and other factors, This forecast updates weekly, adjusting for significant deviations.
Similar Chart
The price prediction chart for Prothena Corporation PLC (PRTA.O) stock, as of Sunday, November 2, 2025 , forecasts a -0.83% change over the next month, based on its high correlation with CCEP.O stock patterns. The similarity between their price movements over the analyzed periods is 95.99%. The right panel lists other stocks with similar price patterns. This prediction is updated every week.
PRTA
No data
CCEP
Down: -0.83%Similarity: 95.99%
Name
Similarity
Up/Down
CCEP.O
95.99%
-0.83%
VRSN.O
95.05%
-1.46%
CLVT.N
95.04%
-3.46%
TTWO.O
94.87%
+1.14%
AR.N
94.84%
+22.22%
JBSS.O
94.65%
-0.64%
ORLY.O
94.56%
+4.71%
OGE.N
94.50%
-2.89%
CPB.N
94.40%
+2.72%
ASML.O
94.40%
+4.31%
PRTA Seasonality Analysis
Based on PRTA's historical stock price data across all years, the probability of a positive return in December is27.27%, suggesting it maynotbe an ideal month to invest in PRTA. In contrast,Julyoffers the highest probability of positive returns at81.82%, making it a potentially strong month for investment.
However, this is only a prediction based on one method, and a comprehensive assessment of the stock's future trend should consider additional factors. Our final stock price commentary incorporates three main evaluation dimensions: technical signals, Moving Average trends, and similar chart pattern matching, with the first two dimensions carrying the primary weight to ensure a more robust and accurate forecast.
Monthly Seasonality
The radar chart shows that buying Prothena Corporation PLC (PRTA.O) stock in July has the highest probability of a positive return (81.82%), while December has the lowest probability (27.27%).
Performance Seasonality
The chart shows Prothena Corporation PLC. (PRTA)'s annual stock price return for the past three years, helping you analyze price trends and identify recurring trends on an annual basis.
Should I buy Prothena Corporation PLC (PRTA.O) stock?
Based on our evaluation of the five key dimensions—Technical Signals, Moving Average trends, Short Sell Data, Similar Chart Pattern Matching and Seasonality Analysis—we have identified the following insights. PRTA has several negative signals and is within a falling trend, so we believe it will perform weakly in the next couple of days or weeks. We therefore hold a negative evaluation of this stock. Our analysis conclusion for this stock is a Strong Sell candidate.
Which months have the highest win rate for buying Prothena Corporation PLC (PRTA.O) stock in a year?
The radar chart shows that buying Prothena Corporation PLC (PRTA.O) stock in July has the highest probability of a positive return (81.82%), while December has the lowest probability (27.27%).
How has Prothena Corporation PLC. (PRTA)'s stock price performed over the past three years?
PRTA's stock price fell by -32.07% in 2023,decreased by -64.06% in 2024, and went down by 27.07%in 2025.
Is PRTA a buy based on overall technical signals summary?
PRTA has 2 buy signals and 6 sell signals now. Overall the technical rating for PRTA is Strong sell . Note that market conditions change all the time. In addition to technical ratings, keep an eye on the Valuation Level of PRTA.
What is the trend of Prothena Corporation PLC (PRTA)'s moving average?
Prothena Corporation PLC's overall moving average trend leans more bearish as of December 16 2025, with 2 negative signals and 2 positive signal.
What is price prediction for PRTA stock next month?
The price prediction chart for Prothena Corporation PLC (PRTA.O) stock, as of November 02 2025, forecasts a -0.83% change over the next month, based on its high correlation with CCEP stock patterns. The similarity between their price movements over the analyzed periods is 95.99%. The right panel lists other stocks with similar price patterns. This prediction is updated every week.
What is price prediction 2026 for Prothena Corporation PLC (PRTA) Stock?
In , Prothena Corporation PLC's value is forecasted to reach an average price of $NaN. The price is predicted to fluctuate between a low of $NaN and a high of $NaN.
What is price prediction 2030 for Prothena Corporation PLC (PRTA) Stock?
In , Prothena Corporation PLC's value is forecasted to reach an average price of $NaN. The price is predicted to fluctuate between a low of $NaN and a high of $NaN.
Negative
Positive
