Beginner 5 min read
Moving averages 101 — SMA, EMA, when each wins
The simplest indicator. The most misused one. Here's when EMA-20 actually beats SMA-50.
A simple moving average (SMA) weights every bar in its window equally. An exponential moving average (EMA) weights recent bars more heavily, so it reacts faster to new price action. Faster isn't always better — EMA is more prone to whipsaws in choppy conditions, while SMA is smoother but later to confirm a real shift.
Short-window EMAs (8, 20) work well as dynamic support/resistance in a trending market. Longer SMAs (50, 200) work better as regime filters — is price above or below the 200 SMA — where you want stability, not speed.