The count refers to the number of distribution days in the last 25 trading sessions. It is reset to zero whenever the market status is changed to Correction. The distribution day count resumes from zero when the market enters into a Confirmed Uptrend. Distribution days are dropped if the Sensex has advanced 5% or more from the close of a particular distribution day or the distribution day has aged out i.e. fallen out from the 25 trading session window. This lowers the overall count.