PRTA Forecast — Price Prediction for 2025. Should I Buy PRTA?

1-Day-Price-Prediction

-0.09%

1-Week Prediction

-1.16%

1-Month Prediction

+1.31%

2026 Prediction

-100%

2030 Prediction

-100%

Based on our advanced algorithm, we have generated comprehensivePRTA stock price predictions for multiple time horizons. Our models indicate potential volatility in the short term, with specific targets calculated for the 1-day and 1-week outlooks.

Looking further ahead, our analysts have pinpointed significant trend shifts in the longer-term data. We have exclusive projections available for the 1-month forecast, a detailed 2026 projection, and a long-range 2030 forecast that reveals potential upside or downside risks.

Unlock the full analysis to access these precise price targets and see exactly where our models predict PRTA is heading. Stay informed and make strategic decisions with our premium 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 $9.19 on Friday, after rising 1.55%

The Prothena Corporation PLC stock price increased by 1.55% on the last trading day (09 Jan 2026), rising from 9.19 to 9.19. Throughout the last trading session, the stock experienced a fluctuation of 2.47% , ranging from a day low of $9.11 to a day high of 9.335. The price has declined in 7 of the last 10 days, resulting in a total change of -5.16% during this period. On the last day, trading volume increase by 25.92K shares, with the rising prices. This could serve as an early warning, indicating that risk may slightly increase in the coming days. In total, 401.92K shares were traded, amounting to approximately 3.70M.

PRTA Technical Signals

PRTA(Prothena Corporation PLC Corp) has 1 buy signal and 3 sell signals now. The current trend is a downtrend starting from 2026-01-02. The total price change during this trend is -0.11%. Recently, the price has increased significantly while volume increased, indicating a strong bullish signal. The average turnover of PRTA over the last 5 trading days is 4.40M. 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 bullish as of Saturday, January 10, 2026, 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 $9.77, and $10.08. A break-up above any of these levels will issue buy signals. There will be some support from the lines at $8.78, and $8.47. 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

Buy

Moving Average

Swing

Positive

Stock Price Above 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

1 Bullish Signals

When Value satisfies Signal, Indicator signals Bullish

Indicators

Signal

Value

Meaning

Moving Average

Price crosses above 5-day SMA

Bullish

3 Bearish Signals

When Value satisfies Signal, Indicator signals Bearish

Indicators

Signal

Value

Meaning

Awesome Oscillator (5, 34)

AO_5_34 < 0

-0.848

Bearish

Momentum (10 days)

MOM_10 < 0

-0.5

Bearish

Moving Average Convergence Divergence (12, 26, 9)

MACD_12_26_9 < 0

-0.29

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 $8.95, with an -2.72%downwardshift. Using a similarity score up to 94.72%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, January 4, 2026 , forecasts a -2.72% change over the next month, based on its high correlation with TVTX.O stock patterns. The similarity between their price movements over the analyzed periods is 94.72%. The right panel lists other stocks with similar price patterns. This prediction is updated every week.

PRTA

No data

TVTX

Down: -2.72%Similarity: 94.72%

Name

Similarity

Up/Down

TVTX.O

94.72%

-2.72%

CVGI.O

94.71%

-10.89%

RC.N

94.69%

+0.93%

NEGG.O

94.55%

+9.90%

GTE.A

94.35%

+6.25%

PLOW.N

94.33%

+1.30%

EXLS.O

94.28%

+2.03%

PBH.N

94.25%

-1.95%

HGV.N

94.25%

+18.88%

BRO.N

94.18%

-3.38%

PRTA Seasonality Analysis

Based on PRTA's historical stock price data across all years, the probability of a positive return in January is27.27%, suggesting it maynotbe an ideal month to invest in PRTA. In contrast,Julyoffers the highest probability of positive returns at80.00%, 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 (80.00%), while January 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.

People Also Watch

Frequently Asked Questions

Should I buy Prothena Corporation PLC (PRTA.O) stock?

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 (80.00%), while January 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 -64.06% in 2024,decreased by -30.14% in 2025, and went down by 0.11%in 2026.

Which bullish technical signals does PRTA have?

Bullish technical signals of PRTA include: Price crosses above 5-day SMA.

Which bearish technical signals does PRTA have?

Bearish technical signals of PRTA include: AO_5_34 < 0, MOM_10 < 0, MACD_12_26_9 < 0.

Is PRTA a buy based on overall technical signals summary?

PRTA has 1 buy signals and 3 sell signals now. Overall the technical rating for PRTA is 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 bullish as of January 10 2026, 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 January 04 2026, forecasts a -2.72% change over the next month, based on its high correlation with TVTX stock patterns. The similarity between their price movements over the analyzed periods is 94.72%. 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.

PRTA Stock Price Prediction

PRTA Stock Price Prediction

Should I Buy Prothena Corporation PLC Stock?

PRTA stock price ended at $9.19 on Friday, after rising 1.55%

PRTA Technical Signals

PRTA Moving Average Analysis

PRTA Short Selling Analysis

Technical Signal

Technical Signals Summary

Moving Average

Short Selling

PRTA Stock Forecast

PRTA Price Prediction & Forecast by Similar Chart Analysis

No data

PRTA Seasonality Analysis

Monthly Seasonality

Performance Seasonality

People Also Watch

Frequently Asked Questions

Should I buy Prothena Corporation PLC (PRTA.O) stock?

Which months have the highest win rate for buying Prothena Corporation PLC (PRTA.O) stock in a year?

How has Prothena Corporation PLC. (PRTA)'s stock price performed over the past three years?

Which bullish technical signals does PRTA have?

Which bearish technical signals does PRTA have?

Is PRTA a buy based on overall technical signals summary?

What is the trend of Prothena Corporation PLC (PRTA)'s moving average?

What is price prediction for PRTA stock next month?

What is price prediction 2026 for Prothena Corporation PLC (PRTA) Stock?

What is price prediction 2030 for Prothena Corporation PLC (PRTA) Stock?