There are lots of different criteria utilized within different stock and index charts, unremarkably: sales of records, cassettes and compact discs; amount of radio airplay; and recently dull of downloads.

the bit of stock and index charts come specific to a particular musical genre and most to the particular geographical location (although download charts are not well pinned down inside this way). a usual period covered by a chart is seven days by having a chart existence printed or even broadcast at the prevent of this instance. Summary stock & index stock and index charts for years and decades come so estimated from either their component each week charts.