What it is — Moving Average
A moving average (MA) plots the average closing price of the last N candles as one line, updating each bar. It filters noise so you can see the market’s direction at a glance. The SMA weights all N candles equally; the EMA weights recent candles more, so it hugs price faster.
Common uses: trend filter (price above rising 200-EMA = bullish context), dynamic support/resistance (pullbacks often pause at the 20/50 EMA), and crossovers (fast MA crossing slow MA) as simple trend-change signals — late, but objective.
Why it matters — Moving Average
- It answers “which side am I on?” instantly — the first filter of any systematic plan.
- It defines pullback entries (mean reversion to the MA within a trend).
- It powers other tools: MACD is two EMAs; countless library indicators are MA-based.
A moving average built from real closes
Suppose EURUSD’s last five daily closes are 1.1210, 1.1224, 1.1218, 1.1235, 1.1229. The 5-day simple moving average is their sum divided by five: 5.6116 ÷ 5 = 1.1222. Tomorrow’s close drops the oldest price and adds the newest — the line is just this arithmetic, rolling. Price sitting above a rising average is the plain-English definition of uptrend context; an exponential MA (EMA) weights recent closes more, so it hugs price tighter and turns sooner. None of it predicts: on the day price crosses the line, the average itself was built mostly from prices already behind you.
What a moving average cannot do
Two honest limits. It lags by construction — by the time a 50/200 crossover prints its famous “golden cross,” the move it announces is months old, and in a range the same pair of lines whipsaws on every wiggle, charging you the spread each time. And it is descriptive, not magnetic: “the 200-day support held” is a story about crowds watching a line, not a law. The professional use is boring — a moving average as a filter: take longs only above the rising line, shorts only below, and let structure and the position-sizing formula do the actual decisions. The filter version of a moving average loses nothing and survives every regime the signal version wrecks.
Frequently asked questions — Moving Average
Which period should I use?
Popular: 20 (short-term), 50 (mid), 200 (macro). Match the period to your holding time; test before trusting. Longer = smoother = later.
Which is better, SMA or EMA?
EMA for responsiveness, SMA for stability — and honestly, the difference is small next to the choices that matter: timeframe, filter discipline, and sizing. Pick one, learn its whipsaws on your pair, stop comparing.
What moving average settings do traders use?
The classic 50 and 200 on daily charts, a 20 EMA on intraday, 100 as the middle child. They work partly because so many watch them — exotic settings trade your patience for no measurable edge.
SMA or EMA?
EMAs respond faster (fewer whipsaws entering, more exiting); SMAs are steadier. Either works — pick one family and stay consistent so your notes mean something.
Related terms — Moving Average
Related tools — Moving Average
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