Double top and bottom is a specific Trading coordinate in the Bitcoin knowledge graph. In practical terms, it identifies the subject described here: Two tests of a similar extreme interpreted as a possible reversal only after structural confirmation. This definition is narrower than promotional usage and should be read together with the implementation, date and evidence attached to the entry.
Double top and bottom is best understood as part of a system rather than as an isolated definition. Its related coordinates show the mechanisms, incentives and historical records that give the term practical meaning.
Double top and bottom describes how participants value, trade or obtain exposure to bitcoin. Market behavior can affect adoption and mining economics, but it does not rewrite consensus rules. Price evidence and protocol evidence answer different questions.
Understanding Double top and bottom helps distinguish a verifiable Bitcoin mechanism or historical record from slogans, products and market narratives.
Primary or authoritative records make these details checkable: double top and double bottom are chart labels for two tests of a selected price region followed by a defined confirmation move; testing requires objective tolerance, pivot, neckline, timing and execution rules. They should be verified before using the coordinate in analysis.
The practical limit is: similar-looking formations can be selected retrospectively and do not guarantee reversal or measured targets; changing scale, venue or pivot definition changes the sample and inflates data-mining risk. A definition, office, chart pattern or published claim is not by itself a prediction or Bitcoin consensus rule.
For the clearest picture, read this entry together with Support and resistance, Break of structure, False breakout, Technical analysis, Backtesting, Bitcoin.