Prothena Corporation plc (PRTA)

PRTA presents a strong sell profile marked by downward momentum and price sitting below most moving averages, including the 200-day level, which signals persistent weakness. Momentum indicators like CCI and MACD are negative and short-term momentum is down, while ADX is low, suggesting the trend lacks strong conviction but remains biased lower. Volatility is moderate and ATR is a few percent of the stock, and despite an anomalous positive OBV signal the dominant picture is distribution beneath key averages. Technical takeaway: Strong Sell.