DEMA — Double Exponential Moving Average

Overview

DEMA reduces the inherent lag of the EMA by applying a double-smoothing technique, giving traders faster trend signals without excessive noise. It is widely used in forex scalping and crypto swing trading, where speed of signal matters. Explore how DEMA compares with the TEMA and other moving averages in our indicator guide library.

How It Works

DEMA = 2 × EMA(n) − EMA(EMA(n)). By subtracting the EMA of the EMA from twice the EMA, DEMA effectively cancels out much of the lag present in a standard EMA. The result tracks price more closely, especially during fast-moving trends.

Key Signals

• Price crossing above DEMA signals a potential uptrend with less delay than EMA.
• DEMA crossovers (fast DEMA over slow DEMA) generate earlier signals than EMA crosses.
• DEMA slope direction provides a cleaner read of short-term momentum.

Common Mistakes

• Expecting DEMA to be noise-free — the reduced lag comes at the cost of more whipsaws.
• Using DEMA with the same period as an SMA and expecting similar smoothness.
• Not back-testing DEMA vs EMA on your specific asset before switching.