NTPC Rising Wedge

The pattern we see is an 'Rising Wedge' pattern. This usually occurs when a security’s price has been rising over time, but it can also occur in the midst of a downward trend as well. (Information via Investopedia)

The declining volumes indicate lower volatility and an imminent power move (long/short), ATR confirms the same.

Considering the bullish green candle with a short body indicates weak buying trend.