Ehlers MESA Adaptive Moving Average

The Ehlers MESA Adaptive Moving Average indicator provides a highly responsive trend-following tool that adapts its smoothing based on the cyclical nature of price action. By utilizing two distinct lines—the MAMA (MESA Adaptive Moving Average) and the FAMA (Following Adaptive Moving Average)—it offers a dynamic way to identify trend direction and potential market reversals with reduced lag compared to traditional moving averages.

Usage

The indicator is primarily used to identify trend changes through the interaction of its two component lines. The MAMA line acts as a fast-moving average that quickly reacts to price shifts, while the FAMA line provides a smoother, lagging reference point.

• Trend Identification: When the MAMA line is above the FAMA line, the market is generally considered to be in an uptrend. Conversely, when the MAMA is below the FAMA, the market is in a downtrend.
• Crossovers: Traders often look for "crossover" events as signals. A bullish signal occurs when the MAMA crosses above the FAMA, while a bearish signal occurs when the MAMA crosses below the FAMA.
• Visual Enhancements: Users can toggle "Mark crossover points" to see visual arrows at every cross, or "Fill MAMA/FAMA Region" to highlight the gap between the two lines for better visual trend confirmation.
• Bar Coloring: The "Enable Bar colors" setting allows the price bars to change color based on the current trend state (MAMA relative to FAMA), streamlining the analysis process.

Details

The MESA Adaptive Moving Average was developed by John Ehlers. The core concept involves using a Hilbert Transform to measure the dominant cycle period of the market. Unlike a standard Exponential Moving Average (EMA) that uses a fixed alpha (smoothing factor), MAMA adapts its alpha based on the phase rate of change.

This version includes the "ekoronin fix," which addresses specific calculation logic to ensure the adaptive smoothing remains consistent with Ehlers' intended mathematical framework. The FAMA line is unique because it is an average of the MAMA line, resulting in an even smoother output that stays in sync with the MAMA but with significantly less vertical movement, making it an effective support/resistance level or trend filter.

Settings

• Source: Determines the price data used for calculation (e.g., HL2, Close).
• Fast Limit: Sets the maximum limit for the adaptive alpha. A higher value makes the MAMA more responsive to price changes.
• Slow Limit: Sets the minimum limit for the adaptive alpha, ensuring the indicator maintains a baseline level of smoothing.
• Mark crossover points: When enabled, plots arrows on the chart at every MAMA/FAMA crossover point.
• Fill MAMA/FAMA Region: Toggles a colored background fill between the MAMA and FAMA lines to visualize trend strength and direction.
• Enable Bar colors: When active, paints the chart bars based on the current bullish or bearish trend.

FAQ

What is the difference between MAMA and FAMA?

The MAMA (MESA Adaptive Moving Average) is the primary adaptive line that follows price closely, while the FAMA (Following Adaptive Moving Average) is a more smoothed version calculated from the MAMA, acting as a secondary signal line.

How does the "ekoronin fix" improve the script?

The fix addresses specific phase calculation nuances found in earlier implementations, ensuring the adaptive alpha reacts correctly to cycle changes as described in John Ehlers' original research.

How can I access this indicator?

You can get access on the LuxAlgo Library for charting platforms like TradingView, MetaTrader (MT4/MT5), and NinjaTrader for free.