as a competitor to Nielsen Media Research, an analytics firm which provide Billboard chart data. Methodology The Rolling Stone charts followed a Friday-Thursday tracking week, based on the Eastern Time Zone in the United States and consistent with the industry standard of releasing new music on Fridays since Global Release Day on July 10, 2015. The final weekly charts were published on the Monday following the previous tracking week. (For example, for a tracking week beginning on Friday, January 1 and ending on Thursday, January 7, the final weekly charts would be published on Monday, January 11.) A song must have been sold for at least $0.49 for that sale to be logged for a given tracking week; units sold for less than the minimum price requirement in the first three months of release would not be considered for weekly charts. A "song unit" was determined by an algorithm that weights a digital song sale as 1 and respectively values 120 subscription-based streams and 360 ad-supported streams as a song-equivalent unit. With regard to album-equivalent units, a song was generally considered to be part of the first album in which it was included, with the exception of the first four weeks in which a song experiences a surge in consumption because of inclusion on a compilation or greatest hits album. For charts where streaming was the only metric for chart positioning, the type of stream was disregarded and weighted equivalent to each other. An album must have sold for at least $3.75 for that sale to be logged for a given tracking week; units sold for less than the minimum price requirement in the first month of release would not be considered for weekly charts, but would be reflected in its lifetime sales. An "album unit" is determined by an algorithm that weights a digital, CD, and cassette standard-format album sale as 1; a digital and CD deluxe-format album sales as 1.3; a vinyl standard-format album sales as 2; a vinyl deluxe-format album sales as 2.5; and respectively values 10 digital song sales, 1,200 subscription-based streams, and 3,600 ad-supported streams as an album-equivalent unit. An album edition was considered "deluxe" if the bonus content does not exceed the duration of the standard edition, in which case the standard and deluxe editions would chart as a single album. An album edition was considered "super deluxe" if the bonus content exceeds the