Dr. Alan Hull created the Detrended Price Oscillator (DPO) sometime during the late 90s and was popularized by Wilder’s book ‘New Concepts And Trading System’ published back in the year 2000 which explains various indicators including DPO along with its usage methodology clearly explained with examples backed up with historical evidence and data points he formed pattern recognition theory & cyclic theories while working near London commodities exchange earlier 1986/1987.