> 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="/files/4q8Bgz6zvCdBhpkstLUG" alt=""><figcaption></figcaption></figure>

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

<figure><img src="/files/lusuyy8ZXIBGGiowQ1wk" 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;