[https://finance.yahoo.com/news/surprisingly-excellent-run-stocks-exactly-090000014.html](https://finance.yahoo.com/news/surprisingly-excellent-run-stocks-exactly-090000014.html)
Still learning about this, but the story says that when the PE gets *this* high it usually drops off fast and take years to recover. My positions since April are doing great, but if PE is really such an indicator of overvalue, what should be the red flag that precedes the drop?