DPO — Detrended Price Oscillator

Overview

The Detrended Price Oscillator strips out the long-term trend to isolate short-term price cycles, helping traders identify overbought and oversold conditions relative to recent behaviour rather than the dominant trend. DPO is ideal for cycle analysis in stocks and forex where regular cyclical patterns exist. Use DPO alongside trend tools from our indicator guide library for context before acting on cycle signals.

How It Works

DPO = Close[−(N/2 + 1) periods ago] − SMA(N). By shifting price data backward, DPO removes the dominant trend and centres the oscillator on historical cycles. Default period is 20. The result shows where price peaks and troughs occur within the cycle.

Key Signals

• DPO peaking above zero suggests the cycle is at a short-term high.
• DPO troughing below zero suggests the cycle is at a short-term low.
• Regular DPO cycle lengths help predict the timing of future turns.

Common Mistakes

• Using DPO for real-time trading signals — the displacement means the latest readings are delayed.
• Applying DPO without first identifying a regular cycle in the asset.
• Confusing DPO with a trend indicator — it explicitly removes trend information.