200 Day Moving Average: What It Is and How It Works

By Uladzimir Leuchankou, founder of Signal2Forex · 7 November 2026

What is the 200 day moving average? The usual answer is the one every handbook gives — the average of the last 200 daily closing prices, drawn as a line on the chart. I suppose that is an answer too. If you typed what is 200 day moving average into a search box, that one line is what you came for.

But for me the 200 day moving average is not a number, it is a border. Above it the market is bought on dips. Below it the market is sold on rallies. The only question that matters is which side you are standing on today.

This week gave a good example. On Thursday, 5 November 2026, the Nasdaq 100 fell about 5% in one session and closed near 26,910 — about 3.8% under its 200-day average, which stood close to 27,980. Nvidia had slipped under its own line a day earlier, 200.13 against 204.67. The S&P 500 was still above its average on 6 November, near 7,380 against 7,325 — less than 1% of room.

And the currency market? EUR/USD has been under its line since the start of September — on 6 November the ECB reference rate was 1.1165, and the line sat about 400 pips higher, near 1.154.

Four markets, one line each, and the line answers the same question for all of them. This is why so many people watch it. Not only funds and banks, but also the person who opens a chart once a week — everyone sees the same number, and the number does not depend on settings or opinions.

200 day moving average definition

The arithmetic is short. Take the closing price of each of the last 200 trading days, add them up, divide by 200. That is today’s value. Tomorrow the oldest close leaves the window, the newest close enters it, and you divide again. A 200 day simple moving average is just this rolling sum — the word simple means every day has the same weight.

Two hundred trading days is about ten months. One day is half a percent of that window, and this is the reason the line moves so slowly. Say the close that drops out is 1.1700 and the close that comes in is 1.1200. The sum falls by 0.0500, the average by 0.0500 divided by 200 — 0.00025, or two and a half pips. A full day of selling moved the line by less than one spread.

I like to show this with a drawing rather than a formula, because the drawing explains the slow turn better than any sentence.

People write the same thing in different ways — 200 day MA, 200-day moving average, 200 DMA or 200DMA, 200 MA, 200 moving average, 200 days moving average, two hundred day moving average in words. These are all one indicator on a daily chart.

The 200 day EMA is a relative, not a twin: it gives more weight to recent closes and turns earlier. I covered that difference in the article on the exponential moving average and in the SMA versus EMA comparison, so here I stay with the simple version.

One more thing about the word day. A 200 period moving average on an hourly chart is a different tool — 200 bars on H1 is about eight trading days, not ten months. My robots work on H1, and when a client writes that the 200 MA on his hourly chart disagrees with my daily line, the answer is always the same: they measure different windows.

Where do you switch it on? In MetaTrader you set the daily version through Insert, Indicators, Trend, Moving Average — period 200, method Simple, apply to Close, on the D1 chart. The platform documentation describes the four averaging methods if you want to compare them.

Two readings of one line

The line gives you two readings, and for me the second is more important than the first. The first reading — price above or below. The second — the slope and the distance. A flat line with price crossing it every second week says nothing about the trend. A rising line with price twenty pips above it says a lot.

EUR/USD shows both states in one autumn. In August the pair traded above its 200-day average, which was then near 1.163, and the line itself was flat since spring. At the start of September the pair closed under it and did not come back. By October the daily closes sat between 1.11 and 1.13, the line slid to about 1.154, and the distance grew to 400 pips.

Which of the two readings was the trend? The distance. The cross in September was only the first warning.

I keep the 200-day line on the daily chart of every pair the Forex V Portfolio trades — as a background, not as a trigger. The robots do not read it. I read it, once a day, server time 00:05, before I look at the open orders. If a pair is 400 pips under its line, I know that every buy on that pair this week is a trade against the year, and I size it as such.

What does that mean in money? On a $10,000 account that means a 0.1-lot buy instead of 0.3 — a 100-pip stop costs $100 instead of $300. On a $100 cent account the same stop is $1 instead of $3. The line did not place the trade. It set the size.

The 200 day moving average rule

The rule most traders know goes like this: hold longs only while the price is above the 200 day moving average, hold shorts only while it is below, and close when the daily candle closes on the wrong side. Three sentences, and traders have followed them for decades.

Why does such a simple rule keep working? Because the line is slow, and a slow line filters out the noise you would otherwise trade. You miss the first 5% of every move. You also miss the first 5% of every false move, and there are more false moves than real ones. The rule does not make you rich in a trend. It keeps you out of the habit of fighting a trend for ten months.

How to use the 200 day moving average without being whipsawed? I check three things before I trust a cross. The first — the slope. If the line is flat, as EUR/USD was in spring and summer, a cross can go either way, and I wait.

The second — the distance in ATR. A close 0.3 ATR under the line is noise, a close 1.5 ATR under it is a decision. The third — what the price did at the line last time. If it bounced there in August and broke through in September, the September break carries more weight, because the buyers who defended the level once are no longer there.

Not only the cross matters, but also the day after. The cleanest signals I have seen on EUR/USD were the ones where the second day closed further from the line than the first. The cross that reverses next morning is the one that empties accounts.

A beginner and an experienced trader

A beginner buys the touch. The price comes down to the line, he sees support, he buys. An experienced trader waits for the close, then for the next day, then sizes the position by the distance. Same chart, same line, two different trades.

A beginner adds the indicator to an H1 chart, sets 200, and thinks he is watching the 200 day moving average. He is watching eight days. An experienced trader opens the daily chart for the line and the hourly chart for the entry, and never confuses the two windows.

A beginner reads a headline that the Nasdaq 100 broke its 200-day line and sells everything on Friday morning. An experienced trader remembers that the index did something similar in March 2025 and again in March this year, and that in four of the last five such breaks before 2025 the index posted double-digit gains in the months after.

Is this week different? I take that count from a Benzinga review of past breaks, not from my own tests, and I do not know whether the November 2026 break will follow the pattern.

We will see at the close on Friday, 13 November, when a full week below the line is on the chart.

Support that holds nothing

Most articles call the 200-day line support or resistance. By my charts it is neither. The line holds nothing — there are no orders sitting on it, because the line is a calculation, not a price where anyone agreed to buy.

What holds is the crowd that watches the line. When the crowd buys the first touch, the line looks like support. When the crowd is exhausted, as it was in EUR/USD in September, the price goes through the line as if it were not there.

So I never place a stop one pip under the 200-day average. I place it where the last swing low is, and I use the line only to decide whether I want the trade at all.

There is another habit I argue with. People draw the 200-day line and then ignore it for months because the price is far away. The far-away case is the useful one. EUR/USD 400 pips under its line is a fact about the whole year, and this fact should sit on the table every time you plan a buy on the pair.

So the 200 day moving average, for me, comes down to four things — the window of 200 closes, the slope of the line, the distance between the price and the line, and what the price did at the line the last time it got there. The more of these four you check before the trade, the steadier the account after it.

Data on this page: EUR/USD daily rates from the European Central Bank, euro foreign exchange reference rates, 3 August to 6 November 2026; Nasdaq 100, Nvidia and S&P 500 levels against their 200-day averages from Benzinga and Seeking Alpha reports of 5–6 November 2026; indicator settings from the MetaTrader 5 user guide. Index and stock levels are rounded.