10.23：探底回升，A股尾盘逆袭，周五能否继续上涨？

Market Index Analysis - The major A-share indices in Shanghai and Shenzhen experienced a rebound after hitting a low, with most stocks showing an upward trend, indicating decent market sentiment [1] - The Shanghai Composite Index showed a long lower shadow in its candlestick, suggesting weak upward momentum and a potential for further adjustments in the near future [3] - The recent three trading days have seen the index reach a high point with declining trading volume, indicating a divergence between price and volume, which is a negative signal [3] Specific Index Insights - The Shanghai 50 Index reached a new short-term high, which is expected to support a slight increase in the Shanghai Composite Index on Friday [3] - The Sci-Tech Innovation 50 Index also showed signs of stabilization with a long lower shadow in its daily candlestick, indicating a potential for short-term recovery [6] - The recent adjustment period for the Sci-Tech Innovation 50 Index has lasted for eight effective cycles, with the ninth cycle expected to bring a turning point, suggesting a high probability of continued upward movement on Friday [6]