# Coin Days Destroyed (CDD) Coin Days Destroyed (CDD) refers to the concept of eliminated or spent coin days. But which coin days are we talking about? After identifying the significance of wallet days for BTCs held for 155 days or more, this type of on-chain data has been deemed crucial in Bitcoin trading. In essence, if 1BTC is held for one day, it generates one coin day. This coin day is considered spent when the BTC is transferred to another wallet. For instance: CDD=(Number of Days Held)×(Amount of BTC Transferred) 12 years = 4380 days CDD = 4380 x 100 = 438,000 coin days have been destroyed. The channel through which CDD data arrives is also very important. For example, CDD data coming to a derivatives exchange (a common term for exchanges where leveraged trades are executed) increases the likelihood of taking Long or Short positions. Conversely, if CDD data arrives at a Spot exchange, it most likely indicates an intention to sell. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://cddstamp.gitbook.io/cddstamp/coin-days-destroyed-cdd.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.