Moving Average
Quick Definition
A calculation that averages a security's price over a specific number of periods, smoothing price data to identify trends.
What Is Moving Average?
A moving average (MA) is a technical indicator that smooths price data by calculating the average price over a specific number of periods. It helps identify trend direction and potential support/resistance levels.
Types of Moving Averages:
1. Simple Moving Average (SMA):
- Equal weight to all periods
- Formula: Sum of prices / Number of periods
- Example: 50-day SMA = Sum of last 50 closes / 50
2. Exponential Moving Average (EMA):
- More weight to recent prices
- Reacts faster to price changes
- Popular for short-term trading
3. Weighted Moving Average (WMA):
- Linear weighting (most recent = highest weight)
- Middle ground between SMA and EMA
Common Periods:
- Short-term: 10, 20 periods (fast)
- Medium-term: 50 periods (intermediate trend)
- Long-term: 100, 200 periods (major trend)
Trading Applications:
- Trend Identification: Price above MA = uptrend, below = downtrend
- Support/Resistance: MAs often act as dynamic S/R
- Crossovers: Golden Cross (50 crosses above 200) = bullish
- Death Cross: 50 crosses below 200 = bearish
Limitations:
- Lagging indicator
- Works better in trending markets
- Can give late signals
Formula
Formula
SMA = (P1 + P2 + ... + Pn) / nMoving Average Example
- 150-day SMA crossing above 200-day SMA (Golden Cross) is bullish
- 2Stock bouncing off 200-day moving average as support
Related Terms
Moving Average Convergence Divergence (MACD)
A trend-following momentum indicator showing the relationship between two moving averages of a security's price.
Trend Line
A diagonal line drawn across price highs or lows to identify the prevailing trend direction and potential support/resistance.
Support Level
A price level where buying pressure typically overcomes selling pressure, preventing further decline.
Resistance Level
A price level where selling pressure typically overcomes buying pressure, preventing further advance.
Relative Strength Index (RSI)
A momentum indicator measuring the speed and magnitude of price changes on a 0-100 scale, used to identify overbought or oversold conditions.
Bollinger Bands
A volatility indicator consisting of a middle moving average and two bands that expand and contract based on price volatility.
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