About the United World Chart:
The United World Chart is a worldwide chart issued every week by Media Traffic, using both sales (digital and physical) and airplay to determine the most popular albums and singles worldwide. The United World Chart uses the same system as the Billboard Hot 100, in which the tracking-week for sales begins on Monday and ends on Sunday; meanwhile the airplay tracking-week runs from Wednesday to Tuesday. The newest weekly chart is therefore issued every Thursday. Each chart is dated with the "week-ending" date of the following Saturday.
You can find the charts here: http://www.mediatraffic.de/
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