The lowest trading price a cryptocurrency has ever reached. It is common practice to keep a currency's all-time low (ATL) in mind when trading, as it represents an important price level of interest for market participants. If a token approaches its ATL, it can signal extreme bearish sentiment but also a potential reversal zone for contrarian traders.
Example
“The altcoin was trading near its ATL, drawing attention from value investors looking for a potential reversal.”