All-Time High (ATH)
The phrase, “All-Time High” refers to the highest price that an asset has received within an exchange for the current trading pair referenced. For instance, if a share of a stock in a certain corporation comes to an IPO at a price of $5 and then trades at $20 prior to falling at $10, the “All-Time High” for the XZY is $20.
The value of an ATH stands for the theoretical maximum price that a trader could have sold the particular asset for. The ATH also represents the maximum price that another trader is willing to pay for said asset within the period it is being sold. The concept may be applied to market capitalization values (market cap).
The opposite of ATH is “All-Time Low” or ATL which pertains to the lowest price point an asset has traded at.