If Tata Power's stock price surpasses the threshold of 396, there is an expectation or speculation that it might experience a decline. This could indicate a significant resistance level or a point at which investors believe the stock has become overvalued, prompting selling pressure and a subsequent decrease in its price. Investors may interpret this as a signal to potentially sell their holdings or refrain from buying further until the price stabilizes or retraces to a more favorable level. Such movements in the stock price could be influenced by various factors, including market sentiment, company performance, industry trends, or broader economic conditions.