Simple Moving Average
SMA · module 01 of 33 · trend
The average closing price over a fixed number of completed candles.
- SMA 20
- SMA 50
- ▲/▼ where the rule triggers
The fast average crossing the slow one marks a shift in the average price — it confirms a move after it has started.
How to apply it
- 1. Add it. Start with 20 and 50 on 5m/15m (Intraday).
- 2. Read the market first. Price holding above a rising SMA describes an uptrend; pullbacks toward it are potential continuation zones.
- 3. Adjust for ranges. The SMA sits in the middle of the range and price crosses it repeatedly, so crossovers produce constant false signals.
- 4. Manage the trade. Place the stop at 1.5 × ATR and the target at 3.5 × ATR, and only act when the chart above shows the trigger.
How it is calculated
SMA(n) = (C₁ + C₂ + … + Cₙ) ÷ n, using closes of completed candles only.
Inputs
- · Period (n)
- · Price source (close by default)
Reading it correctly
In a trend
Price holding above a rising SMA describes an uptrend; pullbacks toward it are potential continuation zones.
In a range
The SMA sits in the middle of the range and price crosses it repeatedly, so crossovers produce constant false signals.
Settings by style
| Style | Suggested values |
|---|---|
| Intraday | 20 and 50 on 5m/15m |
| Swing | 50 and 200 on 4h/1D |
These are conventional starting points, not optimised values. Test any change on your own pair and timeframe before relying on it.
Worked example
EUR/USD 4h closes: 1.0850, 1.0862, 1.0871, 1.0868, 1.0884. SMA(5) = (1.0850+1.0862+1.0871+1.0868+1.0884)/5 = 1.0867. Price at 1.0884 is above the average, and the average is rising — consistent with an uptrend on this timeframe.
When it failed
In a 30-pip AUD/USD range, price crossed the SMA(20) eleven times in two sessions. Every crossover was a signal and every signal reversed, because the average is the centre of the range rather than a boundary.
Limitations
- Lags by roughly half the period — it confirms, it never leads.
- Every candle in the window has equal weight, so an old outlier still moves the line.
- Needs n completed candles of warm-up before the first valid value.
Works well alongside
- · ADX / DMI
- · ATR
- · Market structure
Redundant with
- · EMA
- · WMA
- · KAMA
Stacking these produces agreement by construction, which is not confirmation.
Practice exercise
Plot SMA(50) on 4h EUR/USD for the last three months. Mark each crossover and record whether ADX(14) was above or below 20 at the time. Count how many crossovers in each group led to a 1R move.
Check your understanding
1. Why does an SMA lag price?
- · It is calculated from future prices
- ✓ It averages past closes, so it responds only after several new closes shift the average
- · It uses tick volume
- · It is smoothed twice
An average of the last n closes cannot move ahead of the series it averages. The longer the period, the greater the lag.
2. In which condition are SMA crossovers least reliable?
- · Strong trends
- ✓ Tight ranges
- · After a gap
- · High volatility trends
In a range the average sits in the middle of price action, so price crosses it repeatedly without any directional follow-through.