Reading Commodity Charts and Indicators: Trend, ATR and Volatility-Based Stops

Commodity charts work like any other price chart, but you must pick the right data (front-month, continuous or spot CFD) and respect how differently each market moves. Simple tools travel well: moving averages and channel breakouts for trend, momentum oscillators for stretched moves, and the Average True Range (ATR) to measure volatility. ATR-based stops matter more in commodities than almost anywhere else, because natural gas can move several times as much as gold in a day.

Choose the right data first

• Front-month futures chart: real prices, but an artificial jump at every roll.
• Adjusted continuous chart: no roll jumps, best for indicators over long histories, but older price levels are not real (see contango and backwardation).
• Spot CFD chart (for example XAUUSD): no rolls, but daily candles depend on the broker's server time, and the price differs from futures by the cost of carry.

Whatever you use, use the same source for signals, stops and backtests. For most commodity strategies the daily chart is the core timeframe: intraday charts are noisier, and trading them costs more in spreads and commissions.

Trend tools

Moving averages

A simple moving average (SMA) is the average closing price over a set number of days. Popular choices are the 50-day and 200-day. Price above a rising 200-day average suggests an uptrend; below a falling one, a downtrend. When the 50-day crosses above the 200-day it is called a golden cross, and below it a death cross. These signals are slow: they catch big trends late and give back a lot at the end.

Donchian channels

A Donchian channel plots the highest high and lowest low of the last N days (for example 20 or 55). A close above the upper line is a breakout to a new N-day high. Channels are the basis of the Turtle trading rules covered in the trend-following lesson.

Market structure

Higher highs and higher lows define an uptrend; lower highs and lower lows a downtrend. This is simple and visual, but harder to test objectively than a moving average or channel.

Momentum and mean-reversion tools

The Relative Strength Index (RSI) compares recent gains with recent losses on a scale of 0 to 100; the standard setting uses 14 days. Readings above 70 are called overbought and below 30 oversold. In strong commodity trends, RSI can stay overbought for weeks, so selling just because RSI is high is risky. Some traders use a very short RSI (2 days) to buy brief dips within an uptrend.

Rate of change or 12-month momentum simply measures how far price has moved over a period. It is the basis of time-series momentum strategies.

Volume and open interest

Futures add a useful extra: open interest, the number of contracts still open.

Price	Open interest	Classic reading
Rising	Rising	New buyers entering; trend supported
Rising	Falling	Shorts covering; move may be less durable
Falling	Rising	New sellers entering; downtrend supported
Falling	Falling	Longs liquidating; selling may exhaust

These readings are rules of thumb, not reliable signals on their own. Volume and open interest also shift from one contract month to the next around rolls, so look at totals across all months.

ATR: measuring volatility

The true range for a day is the largest of:

1. today's high minus today's low,
2. the absolute difference between today's high and yesterday's close,
3. the absolute difference between today's low and yesterday's close.

Including yesterday's close means gaps count. The Average True Range (ATR) is the average of the true range over a set number of days; J. Welles Wilder, who introduced it in 1978, used 14 days, and the Turtle traders used 20.

ATR as a percentage of price lets you compare markets. Using round, illustrative numbers:

Market	Price	ATR	ATR % of price
Gold	$4,000	$60	1.5%
WTI crude	$80	$2.00	2.5%
Natural gas	$3.00	$0.15	5.0%
Corn	500 cents	9 cents	1.8%

On these numbers, natural gas moves more than three times as much as gold relative to its price.

Why fixed stops fail in commodities

A "$50 stop" might be sensible on a quiet day in one market but sits inside the normal noise in another. A "1% stop" on natural gas is only a fifth of its typical daily range, so ordinary movement would hit it again and again. Stops should be placed outside normal noise for that market.

An ATR stop sits a chosen multiple of ATR away from entry, often 2 to 3 ATR for daily trend trades:

A trailing ATR stop follows the trade: for a long, it sits a multiple of ATR below the highest close since entry and only moves up. It lets winners run while locking in part of the move.

The wider stop in natural gas does not mean more risk in money, because you will hold a smaller position, as the position sizing lesson shows.

ATR changes over time

Volatility rises in crises and falls in calm periods. Recalculate ATR for each new trade, and use the ATR at entry to size it. Some traders also recalculate trailing stops daily. When ATR suddenly doubles, the same position carries twice the money risk, which is a reason to review open positions after a shock.

A simple chart routine

1. Weekly view: is the market above or below its 200-day average, and near a 55-day high or low?
2. Daily view: has your setup triggered, such as a breakout or a pullback in trend?
3. Volatility: calculate ATR and set the stop at your chosen multiple.
4. Calendar: check for reports in the next few days.
5. Size and record: calculate the position from your risk budget and write the plan in your journal.