Wilder smoothing vs standard EMA
Distinguish Wilder smoothing from the standard EMA and explain why some indicators use it instead.
Lesson path
Technical Analysis + Price Action
Moving Averages
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Distinguish Wilder smoothing from the standard EMA and explain why some indicators use it instead.
The other moving average
There's a third moving average that doesn't get its own line on most charts but is hiding inside several indicators you'll use constantly: Wilder smoothing. It was developed by J. Welles Wilder for his original indicator designs in the late 1970s, and it lives inside RSI, ATR, and ADX. Understanding it explains why those indicators behave the way they do.
Math difference. The standard EMA uses a multiplier of 2 / (N + 1). For a 14-period EMA, that's 2/15, about 0.1333 — so today's close gets about 13% weight. Wilder's smoothing uses a multiplier of 1 / N. For a 14-period Wilder, that's 1/14, about 0.0714 — today's close gets only about 7% weight. Same period setting. Roughly half the responsiveness.
Practical equivalence: a 14-period Wilder smoothing has roughly the same responsiveness as a 27-period standard EMA. The rule is that Wilder of length N is about equal to a standard EMA of length 2N − 1. So when an indicator setting says '14-period Wilder,' your gut should translate that to 'around a 27-period EMA in feel.'
Why this matters for you: when you plot a 14 EMA on price and it doesn't match the smoothing inside a 14-period RSI or ATR, that's not a bug. The RSI is using Wilder smoothing internally with a gentler multiplier. Same period number, different math, different speed. Most charting platforms let you toggle this, but the default for Wilder's original indicators (RSI, ATR, ADX) is Wilder smoothing, not standard EMA.
Recap: Wilder smoothing uses 1/N as its multiplier. Standard EMA uses 2/(N+1). A 14 Wilder behaves like a 27 EMA in responsiveness. Wilder is the default smoothing inside RSI, ATR, and ADX — not a separate indicator, but the engine inside them.
Knowledge check
Answer before moving on.
1. What multiplier does Wilder smoothing use for a 14-period setting?
2. A 14-period Wilder smoothing is roughly equivalent in responsiveness to a standard EMA of what length?
3. Which of these indicators uses Wilder smoothing by default?
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