Preferred Bank's 15min chart triggers RSI overbought and Bollinger Bands narrowing.

Based on the 15-minute chart for Preferred Bank, the RSI indicator has reached an overbought level, and the Bollinger Bands have begun to narrow. This suggests that the stock price has experienced a rapid and unsustainable increase, potentially exceeding the underlying fundamentals. Furthermore, the diminishing magnitude of price fluctuations implies a decrease in volatility.