The provided transcript doesn't detail the specific technical indicators Tom Lee used a month prior to the interview to predict a market bottom. It only mentions that he discussed this with colleagues and felt the market was "at least close" to bottoming out. More detailed information would be needed from another source to answer your question fully.
This CNBC video discusses Tom Lee's market analysis, suggesting that the market might be nearing a bottom this week. Lee, head of research at Fundstrat, points to several factors supporting this view, including oversold conditions, de-risking by investors, and upcoming clarity on tariffs.