All-Time High — the highest price ever reached by a financial asset at any point in its trading history. Breaking an ATH often signals strong momentum and can trigger further buying, as there are no overhead resistance levels from prior holders. New ATH territory is also known as price discovery, where the market must establish new support and resistance levels in real time.
Example
“When Solana broke its ATH, volume surged as momentum traders piled in to ride the breakout into uncharted territory.”