All-time high (ATH)

An all-time high, or ATH, is the highest price a token has ever traded at since trading began. It can be measured two ways: the highest price at any single moment, including brief wicks, or the highest daily close. Charting sites differ on which they show and on which exchanges or pools they pull data from, so two sources can list different ATHs for the same token.

For tokens that trade on a decentralized exchange, the ATH comes from pool trades. One large buy into a thin pool can push the price up for a few seconds and set a new ATH that almost nobody could have sold into. Tracking sites also sometimes record bad ticks from low-liquidity pairs, so a listed ATH can sit far above any price that was actually tradable.

The ATH matters mostly as a reference point. Traders use it to measure drawdown, meaning how far the price has fallen from its peak. A token down 90% from its ATH needs a 10x just to get back to it, which is why a deep drawdown is rarely a bargain by itself. When price breaks above an old ATH, nobody who bought earlier is sitting at a loss, so there are no holders waiting to sell at break-even. That is why traders watch ATH breakouts closely.

Do not read an ATH as a promise of anything. A token that hit its high months ago and fell most of the way back usually has a reason, such as fading interest, heavy selling from early holders, or token unlocks. Newly launched tokens often print their ATH within the first minutes or hours, when snipers and early buyers move the price in thin liquidity, and then trend down.

When you see an ATH claim, check three things. Look at the volume and liquidity at the time of the peak, to see whether real size traded there. Compare market cap rather than price, since supply changes through minting, burning, and unlocks. And look at the chart yourself instead of trusting a post celebrating a new high.