Moving averages

Reading time ~5 min · Last updated 2026-07-17

The moving average (MA) is the oldest indicator in the book: the average closing price of the last N candles, redrawn every candle. Its job is to smooth the noise so the underlying trend becomes visible.

SMA vs EMA

• Simple (SMA) — every candle weighs equally. Smoother, slower to react.
• Exponential (EMA) — recent candles weigh more. Hugs price tighter, turns faster, whipsaws more.

Common lengths and what traders use them as: 20 (short-term momentum guide), 50 (medium trend), 200 (the regime line — above it markets are called bullish, below it bearish). On the daily BTC chart the 200-day MA is arguably the most-watched single line in crypto.

Three ways to use them

1. Trend filter — the simplest edge available to a beginner: prefer longs when price is above the 50/200 MA, shorts when below. It won't catch tops and bottoms; it keeps you off the wrong side of large moves.
2. Dynamic support/resistance — trending markets repeatedly pull back to a rising MA and bounce; the MA acts like a moving level.
3. Crossovers — a fast MA crossing above a slow one signals momentum shift (50 over 200 = the famous golden cross; the reverse, the death cross).

Measuring whether there IS a trend: ADX

The Average Directional Index quantifies trend strength (not direction) on a 0–100 scale. A common reading: below ~20 the market is ranging (trend tools will whipsaw); above ~25 a trend is in force (trend tools earn their keep). Used as a filter, it answers the question MAs cannot ask about themselves.

Trailing the trend: Parabolic SAR and SuperTrend

Two indicators automate the "ride it until it turns" idea:

• Parabolic SAR plots a dot below price in an uptrend that rises each candle, accelerating as the trend extends; price touching the dot flips it to the other side — a built-in trailing stop that tightens as the move ages. Its weakness is chronic: in anything but a clean trend it flips constantly.
• SuperTrend does the same job using ATR: a line trailing price at a multiple of current volatility (commonly 10-period ATR × 3), flipping colour when crossed. Because the distance breathes with volatility, it whipsaws less than SAR and has become a crypto-retail favourite. It pairs naturally with ATR-based stop logic.

Both are exit engines more than entry signals: enter on your setup, let the trailing indicator answer the hardest question — "when do I let go?" For a complete trend system that adds projected support and resistance, graduate to the Ichimoku Cloud.