Ehlers Deviation-Scaled Moving Average (DSMA)

The Ehlers Deviation-Scaled Moving Average indicator provides a responsive trend-following tool that dynamically adjusts its smoothing factor based on price volatility relative to its standard deviation.

Usage

The Usage section describes how the script can be used to identify trend direction and potential reversals. Because the indicator utilizes a deviation-scaling mechanism, it remains smooth during sideways markets but reacts quickly to significant price movements.

• Trend Identification: Users can observe the slope of the EDSMA to determine the current market bias. A rising line suggests bullish momentum, while a falling line suggests bearish momentum.
• Directional Changes: The indicator features optional color-coded movements. When the price gains significant momentum, the EDSMA changes color to reflect the new direction, providing a visual cue for trend shifts.
• Support and Resistance: Like other moving averages, the EDSMA can act as a dynamic level of support or resistance during established trending phases.

Details

The Ehlers Deviation-Scaled Moving Average was originally developed by John F. Ehlers and introduced in the article "The Deviation-Scaled Moving Average" (Technical Analysis of Stocks & Commodities, V. 36:8).

The script construction involves several mathematical layers:

1. Zero-Lag Component: It calculates the difference between current and past source values to reduce lag.
2. Super Smoother Filter (SSF): The resulting values are passed through an Ehlers Super Smoother Filter (supporting 2 or 3 poles) to eliminate unwanted high-frequency noise.
3. Standard Deviation Scaling: The filter output is rescaled in terms of its own standard deviation. This scaling factor determines the "alpha" (smoothing coefficient).
4. Exponential Smoothing: The final EDSMA is an exponential moving average where the alpha is dynamic; the alpha increases (making the average more responsive) when price deviations are large and decreases when they are small.

Settings

• Length: The lookback period used for the standard deviation calculation (Default: 40).
• Super Smoother Filter Length: The period for the SSF used to pre-filter the data (Default: 20).
• Super Smoother Filter Poles: Choose between 2 or 3 poles for the SSF calculation; 3 poles provide sharper filtering but may introduce different lag characteristics.
• Highlight Movements?: Toggles the color-coding of the EDSMA line based on its current slope.
• Source: The price data point used for calculations (Default: Close).

FAQ

How does the EDSMA differ from a standard EMA? Unlike a standard Exponential Moving Average which uses a fixed smoothing constant, the EDSMA dynamically adjusts its responsiveness based on market volatility, allowing it to track price closely during trends while smoothing out noise during consolidation.

Can I use the EDSMA for crossover strategies? Yes, the EDSMA can be paired with price action or another moving average to create crossover signals, though it is often used on its own to identify slope changes.

How do I access the Ehlers Deviation-Scaled Moving Average? You can get access on the LuxAlgo Library for charting platforms like TradingView, MetaTrader (MT4/MT5), and NinjaTrader for free.