Why is Envirotech Sys. falling/rising?

As of 18-Jul, Envirotech Systems Ltd is currently priced at 144.15, reflecting a decrease of 1.0, or 0.69%. The stock has been performing well in the short term, with a 1-week return of 13.91% and a 1-month return of 29.81%, significantly outperforming the Sensex, which has seen a decline of 0.72% over the same week and a modest increase of 0.63% over the month. However, today's performance indicates a decline in investor participation, with delivery volume dropping by 28.32% compared to the 5-day average. Despite this, the stock is trading above its 5-day, 20-day, 50-day, 100-day, and 200-day moving averages, suggesting a generally positive trend in its price movement. There are no available positive or negative factors to further explain the stock's recent movement.
In the broader market context, Envirotech Systems Ltd's strong short-term performance contrasts sharply with the Sensex, which has not only lagged behind in the 1-week and 1-month periods but also shows a year-to-date return of only 5.60%. This indicates that while the stock has been gaining traction, the overall market sentiment may not be as favorable, contributing to the stock's current decline. The liquidity of the stock remains adequate for trading, which may help mitigate some of the impacts of reduced investor participation.