Category: Trend Indicator (Trend Following)

Introduction to Moving Averages

Definition

A Moving Average is a line plotted on the price chart. It calculates the average price of an asset over a past period.

Its purpose is to filter out the "noise" (insignificant small daily variations) to reveal the actual direction of the trend.

SMA or EMA? The Big Difference

There are two main types you will find on Investminder:

• SMA (Simple Moving Average): This is a classic arithmetic average. Each day carries the same importance.
• Advantage: Very stable, ideal for seeing the long-term underlying trend.
• Disadvantage: Reacts slowly to sudden changes ("lag" effect).
• EMA (Exponential Moving Average): This is a weighted average. It gives much more importance to the most recent days.
• Advantage: Reacts very quickly, ideal for short-term trading.
• Disadvantage: Can give false signals if the market is too volatile.

The Formula (Simplified)

• SMA (Simple): The closing prices of the last X days are added up and divided by X.
• EMA (Exponential): The calculation is more complex (uses a weighting multiplier), but simply remember this: yesterday's price counts more than the day before yesterday's price.

with

Standard Periods

The choice of period changes everything:

• Short term (10 or 20 days): Clings close to the price. For active traders.
• Medium term (50 days): The reference for the intermediate trend.
• Long term (200 days): The "Judge of Peace". It separates Bull markets (uptrends) from Bear markets (downtrends).

Moving Averages in Practice

How to Read Them? (Price Position)

This is the most basic yet most effective usage:

• If the Price is Above the Moving Average: The trend is Bullish (Upward). Buying is favored.
• If the Price is Below the Moving Average: The trend is Bearish (Downward). Buying is avoided (or selling is done).
• The Slope: If the line is rising, the trend is strong. If it is flat, the market is directionless (Range).

Concrete Use Cases

• Dynamic Support and Resistance: Unlike a horizontal line drawn with a pencil, the Moving Average moves. The price often "bounces" off it.
• Example: In an uptrend, the price retraces to touch the 50-day moving average, then resumes its upward movement. This is an ideal entry point.
• The Price Crossover: When a candle clearly crosses the moving average (from bottom to top), it is a signal of a trend change.

Pitfalls to Avoid

• The "Lag" Effect: Moving averages look at the past. They do not predict the future; they confirm the present. Do not buy too late after a crossover.
• Flat Market (Range): If the market is moving sideways (lateralization), the moving average will become flat and the price will cross it constantly in both directions. This is where the indicator loses all its usefulness and generates losses (Whipsaws).

To Go Further (Advanced Level)

The Golden Cross & Death Cross

This is the most watched signal by financial media and institutions. It involves two SMAs: the 50 (medium term) and the 200 (long term).

• Golden Cross: The SMA 50 crosses the SMA 200 to the upside.
• Meaning: A powerful and sustainable bull market has probably just begun. It is a major "Buy & Hold" signal.
• Death Cross: The SMA 50 crosses the SMA 200 to the downside.
• Meaning: Warning of danger, a long-term bear market is setting in.

The Fan Strategy (Moving Average Ribbon)

Instead of using a single line, experts sometimes display 3 or 4 (e.g., 20, 50, 100, 200).

• When the lines are tangled: No trend.
• When the lines spread out from each other like an open fan and move upward in parallel: The trend is very healthy and strong.

Mean Reversion

The price always ends up returning to its moving average, as if attracted by a magnet.

If the price moves too sharply away from its 200-day moving average (it is very high above it), it is often a sign of an excess. Even if the trend is bullish, the risk of a correction to "touch the line" is high.

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Updated on: 02/03/2026