Exponential Moving Average (EMA)
Developed by Technical analysis community, popularised by P.N. Haurlan in the 1960s
Quick Answer
The Exponential Moving Average (EMA) is a weighted moving average that assigns exponentially decreasing importance to older prices. Where the SMA treats every price in its lookback equally, the EMA gives more weight to recent prices — making it react faster to new information.
What is the Exponential Moving Average?
The Exponential Moving Average (EMA) is a weighted moving average that assigns exponentially decreasing importance to older prices. Where the SMA treats every price in its lookback equally, the EMA gives more weight to recent prices — making it react faster to new information. This quality is why the EMA is the moving average of choice for most modern traders, particularly on intraday timeframes where responsiveness matters. The EMA forms the basis of many other popular indicators, including the MACD (which is built from EMAs) and the 20 EMA strategy made famous by day traders on the S&P futures. Popular EMA settings include the 9, 20, 50, 100, and 200 — with the 20 and 50 EMAs being the workhorses of most trend-following systems.
How It Works
The EMA is calculated by applying a smoothing constant — typically 2 / (N + 1) where N is the lookback period — to the difference between the current price and the previous EMA value. The result is an average that weights recent prices more heavily while still including older data with diminishing influence. Because the EMA responds more quickly to price changes than the SMA, it tends to hug price more closely in strong trends and generate faster crossovers. The trade-off is more whipsaws in choppy markets. Traders often use the 9 EMA and 20 EMA for fast signals, 50 EMA as a medium-term trend filter, and 200 EMA as a long-term reference.
Formula
Multiplier k = 2 / (N + 1)
EMA_today = (Close_today × k) + (EMA_yesterday × (1 - k))
Initial EMA = SMA over first N periodsHow to Read the EMA
- 1Price above rising EMA: bullish trend
- 2Price below falling EMA: bearish trend
- 3Short EMA crossing above long EMA: bullish signal
- 4Short EMA crossing below long EMA: bearish signal
- 520 EMA acts as dynamic support/resistance on intraday trends
- 6200 EMA separates bull and bear regimes similarly to 200 SMA
- 7Stacked EMAs (e.g. 9 > 20 > 50 > 200) confirm strong trend alignment
Strengths and Weaknesses
Strengths
- +Reacts faster than SMA to new price data
- +Ideal for intraday and swing trading
- +Foundation of many advanced indicators
- +Provides early entry signals in trending conditions
- +Works on every timeframe
Weaknesses
- −More whipsaws than SMA in range-bound markets
- −Responsive to spikes and outliers
- −Still a lagging indicator despite responsiveness
- −Choice of period is subjective and strategy-specific
- −Stacked EMA setups can look messy on low timeframes
Best Timeframes
All timeframes, but especially effective on 15m to 4H intraday charts where responsiveness matters.
Best for: Intraday trend-following systems, pullback entries to the 20 or 50 EMA, and fast-response trend filters on 1H and lower timeframes.
Example Strategy
20 EMA Pullback: On the 1H chart in a confirmed uptrend (price above 200 EMA, 50 EMA rising), wait for a pullback to the 20 EMA. Enter long on a bullish reversal candle with a stop just below the pullback low. First target is the prior swing high, then trail a stop along the 20 EMA for the runner. Skip any pullback that closes below the 50 EMA — that is an early warning that the uptrend is weakening.
This example is educational, not financial advice. Always backtest any strategy and manage risk with appropriate position sizing.
Related Indicators
Brokers That Offer the EMA
Any broker with MetaTrader 4, MetaTrader 5, or cTrader supports the EMA as a standard indicator. Below are our top EU-regulated picks.
Frequently Asked Questions
What is the Exponential Moving Average (EMA)?
The Exponential Moving Average (EMA) is a weighted moving average that assigns exponentially decreasing importance to older prices. Where the SMA treats every price in its lookback equally, the EMA gives more weight to recent prices — making it react faster to new information. This quality is why the EMA is the moving average of choice for most modern traders, particularly on intraday timeframes where responsiveness matters. The EMA forms the basis of many other popular indicators, including the MACD (which is built from EMAs) and the 20 EMA strategy made famous by day traders on the S&P futures. Popular EMA settings include the 9, 20, 50, 100, and 200 — with the 20 and 50 EMAs being the workhorses of most trend-following systems.
Who developed the EMA?
EMA was developed by Technical analysis community, popularised by P.N. Haurlan in the 1960s.
What is the formula for the EMA?
Multiplier k = 2 / (N + 1) EMA_today = (Close_today × k) + (EMA_yesterday × (1 - k)) Initial EMA = SMA over first N periods
What timeframes work best with EMA?
All timeframes, but especially effective on 15m to 4H intraday charts where responsiveness matters.
What is EMA best used for?
Intraday trend-following systems, pullback entries to the 20 or 50 EMA, and fast-response trend filters on 1H and lower timeframes.