PRTA Prothena Corp Forecast, Technical & Fundamental Analysis

Momentum Indicator for PRTA turns negative, indicating new downward trend

PRTA saw its Momentum Indicator move below the 0 level on October 22, 2025. This is an indication that the stock could be shifting in to a new downward move. Traders may want to consider selling the stock or exploring put options. Tickeron's A.I.dvisor looked at 94 similar instances where the indicator turned negative. In of the 94 cases, the stock moved further down in the following days. The odds of a decline are at .

Technical Analysis (Indicators)

Bearish Trend Analysis

The 10-day RSI Indicator for PRTA moved out of overbought territory on October 16, 2025. This could be a bearish sign for the stock. Traders may want to consider selling the stock or buying put options. Tickeron's A.I.dvisor looked at 28 similar instances where the indicator moved out of overbought territory. In of the 28 cases, the stock moved lower in the following days. This puts the odds of a move lower at .

The Moving Average Convergence Divergence Histogram (MACD) for PRTA turned negative on October 16, 2025. This could be a sign that the stock is set to turn lower in the coming weeks. Traders may want to sell the stock or buy put options. Tickeron's A.I.dvisor looked at 45 similar instances when the indicator turned negative. In of the 45 cases the stock turned lower in the days that followed. This puts the odds of success at .

Following a 3-day decline, the stock is projected to fall further. Considering past instances where PRTA declined for three days, the price rose further in of 62 cases within the following month. The odds of a continued downward trend are .

PRTA broke above its upper Bollinger Band on October 15, 2025. This could be a sign that the stock is set to drop as the stock moves back below the upper band and toward the middle band. You may want to consider selling the stock or exploring put options.

Bullish Trend Analysis

The Stochastic Oscillator demonstrated that the ticker has stayed in the oversold zone for 1 day, which means it's wise to expect a price bounce in the near future.

Following a 3-day Advance, the price is estimated to grow further. Considering data from situations where PRTA advanced for three days, in of 290 cases, the price rose further within the following month. The odds of a continued upward trend are .

The Aroon Indicator entered an Uptrend today. In of 152 cases where PRTA Aroon's Indicator entered an Uptrend, the price rose further within the following month. The odds of a continued Uptrend are .

Fundamental Analysis (Ratings)

The Tickeron Price Growth Rating for this company is (best 1 - 100 worst), indicating steady price growth. PRTA’s price grows at a higher rate over the last 12 months as compared to S&P 500 index constituents.

The Tickeron Valuation Rating of (best 1 - 100 worst) indicates that the company is slightly overvalued in the industry. This rating compares market capitalization estimated by our proprietary formula with the current market capitalization. This rating is based on the following metrics, as compared to industry averages: P/B Ratio (1.721) is normal, around the industry mean (24.410). P/E Ratio (0.000) is within average values for comparable stocks, (54.672). Projected Growth (PEG Ratio) (0.000) is also within normal values, averaging (2.161). Dividend Yield (0.000) settles around the average of (0.039) among similar stocks. P/S Ratio (54.054) is also within normal values, averaging (355.200).

The Tickeron PE Growth Rating for this company is (best 1 - 100 worst), pointing to worse than average earnings growth. The PE Growth rating is based on a comparative analysis of stock PE ratio increase over the last 12 months compared against S&P 500 index constituents.

The Tickeron SMR rating for this company is (best 1 - 100 worst), indicating weak sales and an unprofitable business model. SMR (Sales, Margin, Return on Equity) rating is based on comparative analysis of weighted Sales, Income Margin and Return on Equity values compared against S&P 500 index constituents. The weighted SMR value is a proprietary formula developed by Tickeron and represents an overall profitability measure for a stock.

The Tickeron Profit vs. Risk Rating rating for this company is (best 1 - 100 worst), indicating that the returns do not compensate for the risks. PRTA’s unstable profits reported over time resulted in significant Drawdowns within these last five years. A stable profit reduces stock drawdown and volatility. The average Profit vs. Risk Rating rating for the industry is 94, placing this stock worse than average.