Simple Moving Average (SMA): How to Read It
The Simple Moving Average adds up the last N closing prices and divides by N to create a smooth line. It filters out daily noise so the underlying direction of the trend is easier to see.
The formula
Common settings: 20, 50 and 200 periods on daily charts
How to read it
- Price above a rising SMA suggests an uptrend.
- Price below a falling SMA suggests a downtrend.
- A flat SMA with price crossing back and forth suggests a sideways market.
- Longer periods react slowly but give steadier signals; shorter periods react fast but are noisier.
- Popular SMAs like the 50 and 200 day can act as areas of support or resistance.
Typical signals
- Price closing above the SMA as a possible bullish shift.
- Price closing below the SMA as a possible bearish shift.
- A shorter SMA crossing above a longer SMA, often called a golden cross.
- A shorter SMA crossing below a longer SMA, often called a death cross.
Pitfalls to avoid
- It lags price, so signals arrive after moves begin.
- It produces many false crossovers in sideways markets.
- Every price in the window has equal weight, even old ones.
Strategies that use it
FAQ
What is the best SMA period?
There is no single best period. The 50 and 200 day are widely watched, while shorter periods suit faster trading.
Is SMA or EMA better?
The SMA is smoother and slower, while the EMA reacts faster. Each suits different styles.
Can SMA predict prices?
No. It summarizes past prices to clarify trend direction; it does not forecast the future.
Works well with
Exponential Moving Average
The Exponential Moving Average is a moving average that gives more weight to recent prices. It responds faster than the SMA, which helps traders spot trend changes sooner.
💪Average Directional Index
The Average Directional Index measures how strong a trend is, regardless of its direction. Paired with the +DI and -DI lines, it also helps identify which side is in control.
🌡️Relative Strength Index
The Relative Strength Index measures the speed and size of recent gains versus losses on a scale from 0 to 100. It helps spot when a market may be stretched too far in one direction.