Moving Averages Explained: Simple vs Exponential (With Examples)

If there's one indicator every trader needs to understand, it's the moving average.

I'm not exaggerating. Moving averages are foundational. They're used by day traders, swing traders, and long-term investors alike. They appear in countless trading strategies. And once you understand them, you'll see price action in a completely different way.

But here's what frustrates me: most explanations make moving averages way more complicated than they need to be. They throw formulas at you, show you a dozen different types, and leave you more confused than when you started.

Let's fix that today.

By the end of this post, you'll understand exactly what moving averages are, the difference between Simple (SMA) and Exponential (EMA), and how I use them in my own trading.

What is a Moving Average?

A moving average is simply the average price of an asset over a specific period of time, recalculated as each new candle forms.

That's it. Nothing magical.

Think of it like checking the weather. If I asked you "what's the temperature today?" you might say 72 degrees. But if I asked "what's the average temperature this week?" you'd add up seven days and divide by seven. That average smooths out the daily fluctuations and gives you a better sense of the overall trend.

Moving averages do the same thing for price.

Instead of looking at every wild swing and choppy candle, a moving average shows you the general direction price is heading. It filters out the noise.

On a chart, a moving average appears as a smooth line that follows price. When price is generally going up, the moving average slopes upward. When price is falling, it slopes down. And when price is choppy and going nowhere, the moving average flattens out.

The "moving" part means it constantly updates. Each time a new candle closes, the oldest price drops off and the newest price gets added. So the average keeps moving along with price.

The number you choose—like 20, 50, or 200—determines how many periods go into the calculation. A 20-period moving average uses the last 20 candles. A 200-period uses the last 200. More periods mean a smoother, slower-moving line.

Simple Moving Average (SMA)

The Simple Moving Average is exactly what it sounds like: a simple arithmetic average.

Take the closing prices of the last X periods, add them up, and divide by X. If you're using a 10-period SMA, you add the last 10 closing prices and divide by 10. When the next candle closes, you drop the oldest price, add the newest, and recalculate.

When to use the SMA:

The SMA works best for identifying longer-term trends. Because it gives equal weight to every period, it's slower to react to recent price changes. This can be an advantage when you want to see the "big picture" without getting distracted by short-term moves.

Example: The 200-day SMA on SPY

The 200-day SMA is probably the most watched moving average in the world. Institutional investors use it to define the long-term trend. When SPY is above its 200-day SMA, the market is generally considered bullish. Below it, bearish.

This isn't some magic line—it's just that enough big players watch it that it becomes a self-fulfilling prophecy. Price often finds support or resistance near the 200 SMA.

Pros of SMA: - Easy to understand and calculate - Less prone to false signals in choppy markets - Great for identifying major trends

Cons of SMA: - Slow to react to sudden price changes - Lags significantly behind current price - May give late entry signals

Exponential Moving Average (EMA)

The Exponential Moving Average addresses the main weakness of the SMA: lag.

Instead of weighting every period equally, the EMA gives more importance to recent prices. The most recent candles have a bigger impact on the calculation than older ones. This makes the EMA react faster to current price action.

The math behind it involves a multiplier based on the number of periods, but honestly, you don't need to know the formula. Your charting platform calculates it automatically. What matters is understanding how it behaves differently from the SMA.

When to use the EMA:

The EMA shines when you need faster signals. If you're swing trading and want to catch moves early, the EMA will get you in (and out) quicker than the SMA. It's more responsive to what price is doing right now.

Example: The 20-day EMA for swing trades

I use the 20-period EMA frequently in my analysis. On a daily chart, it gives me a sense of the short-term trend. On the 4-hour chart, it helps identify momentum shifts.

When price pulls back to the 20 EMA in an uptrend, it often finds support there. Traders call this "buying the dip to the EMA." It's not a guaranteed strategy, but when combined with other confirmations, it works well.

Pros of EMA: - Reacts faster to price changes - Better for short-term trading signals - Reduces lag compared to SMA

Cons of EMA: - More sensitive means more false signals - Can whipsaw in choppy markets - Requires confirmation before acting

SMA vs EMA: Which Should You Use?

Here's my honest answer: both.

I know that's not the definitive answer you wanted, but hear me out. SMA and EMA serve different purposes, and using both gives you a more complete picture.

My approach:

  • SMA for the big picture: I use the 200 SMA to identify the major trend. If price is above the 200 SMA, I favor long trades. Below it, I'm cautious about going long and more open to shorts.

  • EMA for timing: I use faster EMAs (like the 9, 20, and 50) for entry timing and momentum assessment. These help me see when a pullback might be ending or when momentum is shifting.

The beginner mistake:

New traders often throw five or six moving averages on their chart, hoping more is better. It's not. Your chart becomes a mess of crossing lines, and every setup has conflicting signals.

Start simple. Use two or three moving averages maximum. Learn how they behave before adding complexity.

Practical Application: The 20/50/200 Framework

Here's how I actually use moving averages in my A+ Setup methodology:

The 200 EMA (or SMA): Defines the major trend. I want to trade in the direction of this line. If price is above and the 200 is sloping up, I'm looking for longs. The opposite for shorts.

The 50 EMA: Intermediate trend. This shows me the trend on the timeframe I'm trading. Price should be above the 50 EMA for long setups.

The 20 EMA: Short-term momentum. This is my "pulse check." When price pulls back to the 20 EMA in an uptrend and bounces, that's often a good entry point—especially if I have other confirmations lined up.

Example trade setup:

Let's say I'm looking at Bitcoin on the daily chart. Price is above the 200 EMA (major uptrend), above the 50 EMA (intermediate trend is bullish), and just pulled back to touch the 20 EMA. There's a bullish engulfing candle forming at the 20 EMA.

That's multiple factors lining up: trend alignment, support at the moving average, and a reversal pattern. Not a guaranteed winner, but a high-probability setup.

The key is never using moving averages alone. They're one piece of the puzzle, not the whole picture.

Moving Average Crossover Strategies

You'll hear a lot about "golden crosses" and "death crosses"—when a faster moving average crosses above or below a slower one.

Golden Cross: 50 MA crosses above 200 MA (bullish signal) Death Cross: 50 MA crosses below 200 MA (bearish signal)

These work on long timeframes but are terrible for short-term trading. By the time the crossover happens, you've often missed a significant portion of the move. They're better used as confirmation that a trend change has occurred, not as entry signals.

For shorter-term crossover strategies, people use combinations like 9/20 EMA or 12/26 EMA. These give faster signals but also more false ones.

My advice: don't rely on crossovers as your primary strategy. Use them as one confirmation among many.

Putting It All Together

Moving averages are powerful tools, but they're tools—not crystal balls.

They tell you what has happened and suggest what might continue to happen. They don't predict the future. Price can slice through any moving average at any time if there's enough buying or selling pressure.

Key takeaways:

  1. SMA is slower and better for long-term trend identification
  2. EMA is faster and better for short-term signals
  3. Use both for a complete picture
  4. Keep it simple—two or three moving averages maximum
  5. Never trade moving averages alone—always combine with other analysis

If you want to master moving averages and all the key technical indicators, check out our Technical Analysis 101 course. It covers everything from basic chart reading to advanced pattern recognition.

And if you want to see how I apply these concepts in real-time, our trading signals show exactly how these tools come together for actual trades.

Moving averages have been around for decades because they work. Learn them well, and you'll have a foundation that serves you for your entire trading career.

Trading involves substantial risk. This is educational content only. Always do your own analysis before making trading decisions.