SEI Investments' 15min chart indicates Bollinger Bands expanding upward, KDJ golden cross.

Based on the 15-minute chart analysis of SEI Investments, the Bollinger Bands are currently expanding upward, indicating a strong upward trend in the stock price. Furthermore, the KDJ Golden Cross has recently occurred, which suggests that the momentum of the stock price is shifting towards the upside and has the potential to continue increasing in the near future.