The 200-day moving average (200 DMA) is the average closing price of an asset over the last 200 trading days, plotted as a line on a chart. Traders use it as a long-term trend filter: price above it is generally treated as an uptrend, price below it as a downtrend. It often acts as dynamic support or resistance, but it lags price, so it confirms trends late and gives false signals in sideways markets.
The 200-day moving average is probably the most watched line on any stock chart. Fund managers, news anchors and retail traders all refer to it. This guide explains what it actually is, how people use it, and why it is a filter rather than a prediction.
What it is and how it is calculated
Add up the closing prices of the last 200 trading days and divide by 200. Do that again tomorrow, dropping the oldest day, and you have a line that moves smoothly with price. About 200 trading days is roughly 40 weeks, or most of a year, so the line shows the long-term direction and ignores most short-term noise.
There are two common versions:
- Simple moving average (SMA): every day carries equal weight. This is what "200-day moving average" usually means.
- Exponential moving average (EMA): recent days carry more weight, so it reacts a little faster.
How traders use it
1. As a trend filter. The simplest rule: price above the 200 DMA means the long-term trend is up, below means down. Many traders only take long trades above it and avoid or reduce risk below it. This does not predict anything. It keeps you from fighting the larger trend.
2. As dynamic support and resistance. In an uptrend, pullbacks often pause near the 200 DMA because many participants watch it. This is partly self-fulfilling. The line is not a precise level, so treat it as a zone, not a price.
3. The golden cross and death cross. A golden cross is when the 50-day average crosses above the 200-day. A death cross is the reverse. Both are slow signals: by the time they appear, a large part of the move has usually already happened.
4. As a slope check. A rising 200 DMA means the long-term average is climbing. A flat line means no trend, and the line will be crossed repeatedly.
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A common framework: hold or buy only when price closes above a rising 200-day average, and step aside when it closes below. Backtests of variants of this idea tend to show smaller drawdowns than buy-and-hold, because the rule gets you out of long bear markets, but they often show similar or lower total returns, and they produce many small losses in sideways periods when price whipsaws around the line. The value is risk reduction, not higher profit.
Whatever you choose, test it on data across different market conditions and include costs and taxes. See what is backtesting.
Where it fails
- It lags. It is built from 200 days of history, so it turns after the move has begun.
- Whipsaws in ranges. When price sits near the line, you get repeated false crosses.
- One line does not make a system. It does not tell you where to place a stop or how big to trade. See position sizing.
- Different assets behave differently. A line that works well for broad stock indices may be a poor guide for a single volatile stock or a coin.
How to use it on a chart
- Add a 200-period simple moving average to a daily chart.
- Note whether price is above or below it, and whether the line is rising, flat or falling.
- Use that as the backdrop for shorter-term setups, such as pullbacks to support. See support and resistance.
- Keep the rule the same every time and record the results in a journal. See how to journal your trades.
For other charting tools, see the best TradingView indicators.
FAQ
What does the 200-day moving average tell you?
It shows the long-term trend direction. Price above it is generally treated as an uptrend and price below it as a downtrend.
Is the 200-day moving average a buy or sell signal?
Not by itself. It is a trend filter. Traders combine it with entries, stops and position sizing, and it works less well in sideways markets.
What is the difference between the 200 SMA and 200 EMA?
The simple average weighs all 200 days equally. The exponential one weights recent days more, so it reacts faster but also gives more false signals.
What is a golden cross?
When the 50-day moving average crosses above the 200-day. It is a slow, lagging signal that some traders use to confirm an uptrend. The opposite is a death cross.
Can I use the 200-day moving average on weekly or intraday charts?
Yes. A 200-period average works on any timeframe, but "200-day" is specifically for daily charts. On a one-hour chart it covers about six weeks of US stock trading hours.
Put This Into Practice
- Score your next setup 0–100 with the Void Engine before entering
- Log the trade and tag the setup in the TradLog
- Review weekly: keep what pays, cut what doesn't
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Educational content, not financial advice. Trading involves substantial risk of loss.