Τι είναι το ATR; Stop loss στον χρυσό με βάση τη μεταβλητότητα

This guide explains what ATR is, how it is calculated with real figures, how to turn it into a stop distance and a lot size for a gold trade, and where it misleads. The reader question it answers is simple: what is the ATR indicator, and how do I use ATR to set a stop loss on gold?

What Is the ATR Indicator?

ATR is a volatility indicator that averages the "true range" of recent candles, so a reading of 26 on a daily gold chart means gold has recently moved about $26 from its high to its low per day, gaps included. It was introduced by J. Welles Wilder in his 1978 book New Concepts in Technical Trading Systems, and the standard setting is 14 periods.

The true range of a candle is the largest of three distances, as defined in StockCharts ChartSchool's ATR reference and in TradingView's ATR documentation:

Using the largest of the three matters for gold. When the market reopens on Monday after a weekend headline, or jumps between sessions, the high-low range of the new candle can look calm while the real move from the previous close was large. True range counts that gap; a plain high-low range would hide it.

ATR is not directional. A rising ATR can come with a rally or a sell-off. That is the most common misunderstanding, and it is why ATR belongs with your risk settings, not with your entry signal.

How Is ATR Calculated? A Worked Gold Example

The figures below are an illustration with round, hypothetical prices, not current market levels. To keep it short, it uses a 5-period ATR; the logic for 14 periods is identical.

The previous close before Day 1 was 3,300.

Day 3 is the instructive row. Its own range was only $20, but it opened after a jump from the 3,309 close, so its true range is $33.

The first ATR is a simple average: (22 + 20 + 33 + 25 + 30) / 5 = $26.

After that, Wilder's method smooths each new reading into the old one instead of starting again. The general rule is: new ATR = (previous ATR × (n − 1) + today's true range) / n. For the standard 14 periods, ChartSchool writes it as (prior ATR × 13 + current TR) / 14. In our 5-period example, if Day 6 has a true range of $18, the new ATR is (26 × 4 + 18) / 5 = $24.40. One quiet day lowers ATR only a little, which is the point: it describes the recent regime, not the last candle.

Some platforms offer a simple moving average of true range instead of Wilder's smoothing, so two charts can show slightly different ATR values for the same data. Check the setting before comparing numbers. If you want the background on smoothing, see how moving averages work.

How Do You Use ATR to Set a Stop Loss on Gold?

Multiply ATR by a factor, often between 1 and 2, and place the stop that distance from your entry. The factor is your decision; ATR only supplies the unit. A stop inside normal noise gets hit by ordinary movement, while a stop at 1.5× ATR at least sits beyond a typical candle's range.

Then size the position from that distance, never the other way round. Here is the full calculation for an account of $20,000 risking 0.5%, or $100, per trade. It assumes one standard lot of gold is 100 ounces, so a $1 move is worth $100 per lot and $1 per 0.01 lot. Contract sizes vary between brokers, so check yours.

Read the table from right to left. The dollar risk stays at or below $100 in every regime. What changes is the position size. When gold is wild, an ATR-based method automatically makes you smaller; when it is calm, it lets you trade a little larger with a tighter stop. That single adjustment prevents one of the most common account killers: using the same lot size in a news week as in a holiday week. The step-by-step method for converting a stop distance into lots is covered in our guide to position sizing on gold.

Rounding down is not a detail. In the volatile row, the exact answer is 0.0167 lot. Rounding to 0.02 would raise the risk to $120, a 20% overshoot of your own rule.

Which Timeframe Should Your ATR Come From?

Use the ATR of the timeframe you trade on. A daily ATR of $26 might sit next to an hourly ATR of $4 on the same day. A swing trader holding for days needs the daily figure; an intraday trader using a daily ATR stop would place it absurdly far away.

These multiples are common starting points, not rules. Test any choice on your own data before trusting it.

There is also a Gulf-specific wrinkle. A "daily" candle starts and ends at your broker's server time, which is often not Makkah time. Two brokers with different server clocks can draw different daily candles, and therefore slightly different daily ATR, for the same market. Some feeds also print a short Sunday candle that drags the average down. Before comparing numbers, check your broker's server time and whether it shows a Sunday bar.

What Are the Limits of ATR?

ATR describes the past, so it is always a step behind. It rises after volatility has arrived, not before. In the minutes around a major US release such as the jobs report, gold can move several times its hourly ATR, spreads widen, and a stop can fill well beyond its level. Our guides on what volatility really measures and on stop loss orders explain why no indicator removes that gap risk.

ATR also says nothing about where your stop makes structural sense. A stop at 1.5× ATR that sits just above an obvious support level may still be a poor stop. The better practice is to find the level where your trade idea is proven wrong, then use ATR to check that the distance is not inside normal noise.

Finally, a wider stop is not a safer trade. It only feels safer. If you widen the stop without shrinking the lot, you have simply increased your risk. The honest summary: ATR is a ruler, not a strategy.

How Does TIC Help With This?

The free calculators in the TIC app and on TIC Desk include a Position Size tool that takes your balance, risk percentage and stop distance and rounds the lot size down, never to the nearest step. One difference from the example above: the TIC calculator expresses gold stop distances in pips, where one gold pip is $0.10, so a $39 stop is entered as 390 pips. Brokers do not all use the same gold pip definition, so always confirm against your own contract specification.

Tools help with arithmetic, not judgement. The traders who last are the ones whose risk per trade stays small and consistent over hundreds of trades, which is also what any honest, independently verified track record should show.