> For the complete documentation index, see [llms.txt](https://cryptoquote.gitbook.io/cryptoquote/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cryptoquote.gitbook.io/cryptoquote/apis/analytics-apis/single-security-analysis/historical-change-usd-and-percentage.md).

# Historical Change $ and Percentage %

#### <mark style="color:orange;">Description</mark>

Historical percent change for dollar or percent measures the change in the price of a crypto over a period of time. It is calculated by taking the difference between the current price and a price from a previous period, and expressing that difference as a percentage of the previous price.

{% embed url="<https://www.youtube.com/watch?index=16&list=PLog30vtb4ZA76-tBWML69sR_RuKNn1kaB&v=HvkCUEEoNFc>" %}

#### <mark style="color:orange;">End Point</mark>

<figure><img src="https://2909488962-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FmbuOiGVVJ9DU6VgYC0Ki%2Fuploads%2FfeYfbtDir1WdCFEsi0Nd%2FGitbookHistoricalChangeAndPercentageEndpoint.png?alt=media&amp;token=06fba100-064b-407b-bb1d-e9616bafef6f" alt=""><figcaption></figcaption></figure>

#### <mark style="color:orange;">Example</mark>

<figure><img src="https://2909488962-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FmbuOiGVVJ9DU6VgYC0Ki%2Fuploads%2FFrHLDqkXXhSHnrbcCIXJ%2FGitbookHistoricalChangeAndPercentageExample.png?alt=media&amp;token=b5e94110-6dc1-4601-bfd0-9288c55f2a3b" alt=""><figcaption></figcaption></figure>

<mark style="color:orange;">**Use Cases:**</mark>

## [Click here for a Free API key](https://www.cryptoquote.io/register) then [**Test the API yourself!**](https://www.cryptoquote.io/api_doc?code=symbol_change_percentage\&page=api_analytics)&#x20;