The significant drop in iSun's stock price is directly related to the announcement of a reverse stock split, a move typically viewed negatively by the market as it often reflects underlying issues with the company's stock performance. The reverse split is aimed at ensuring compliance with Nasdaq's listing requirements, but the immediate market reaction has been sharply negative, indicating investor concerns over the company's value and future prospects. The oversold RSI may suggest a potential rebound, but the overall sentiment remains bearish in the short term.