Source: https://fxcodebase.com/code/viewtopic.php?f=17&t=716
Forum: 17 · Topic 716 · 3 post(s)
Nikolay.Gekht · Tue Apr 20, 2010 4:24 pm
Detrended Price Oscillator eliminates the trend effect of price movement.
The formula is DPO = PRICE - MVA(PRICE, (N / 2 + 1)) (if N = 12, DPO is the same as the DiNapoli Detrend Oscillator).

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The indicator was revised and updated
disilvapattahk · Wed Jan 14, 2015 11:17 pm
The positive value of the indicator forecasts higher prices. The negative value forecasts the lower prices. Chande also recommends to user 3-day smoothing line as a trigger. When the oscillator falls below or crosses above the trigger line it shows a change of the trend.
Apprentice · Tue Jul 18, 2017 7:43 am
The indicator was revised and updated.