The Bitcoin Rainbow Chart was first constructed by a Reddit user, known as Azop. In 2014, Azop created the chart as a fun way to help evaluate the long-term price movements of Bitcoin. The chart was created using rainbow colors, which is where the name of the chart was derived. After popularity grew, news of the chart reached a developer known as Trolololo who worked for a website called Bitcointalk. Trolololo applied a Logarithmic Regression to the colored bands, which is a function that allowed the bands to increase in a non-linear way. The chart was discovered by Uber Holger, who developed it even further and eventually placed it on a website called Blockchain Center. This is now the most popular place to view the Rainbow Chart.