← Back to Blog · 2026-09-01 · 5 min read · Strategy Case Study

Let’s be honest: we’ve all been there. You see a market going absolutely vertical, and every bone in your body screams, “This has to reverse.” You put on a small short position. It goes against you. You add to it. It goes against you again. Before you know it, a parabolic bull run has wiped out your account.

This is the exact pain point that destroyed countless discretionary traders during the historic 2021 thermal coal rally in China. But while ego-driven traders were getting steamrolled trying to pick the top, systematic trend followers were quietly printing equity curves. Let’s break down exactly how a robust trend following strategy navigated one of the most violent commodity moves in recent history, and what global retail traders can learn from it today.

The 2021 Thermal Coal Context: A Market on Steroids

In the second half of 2021, China faced a severe power crunch. A perfect storm of post-pandemic industrial demand, supply chain bottlenecks, and domestic mine safety inspections caused thermal coal supplies to tighten drastically. Prices went on a historic tear, surging from around 800-900 RMB per ton in early 2021 to staggering highs of roughly 1,900-2,000 RMB per ton by October.

It was a market that defied traditional valuation models. Discretionary traders who tried to fade the rally based on “historical resistance” or “overbought RSI” got taken out behind the woodshed. The lesson? In a true supply-driven panic, markets can stay irrational longer than you can stay solvent. Trend followers, however, don’t care about valuation. They only care about price action and risk management.

Know Your Instrument: Thermal Coal (ZC) Contract Specs

Before we look at the strategy, you need to understand the tool. If you want to trade Chinese commodity futures, ignoring contract specifications is financial suicide. Thermal coal futures (ticker: ZC) trade on the Zhengzhou Commodity Exchange (ZCE).

Here are the hard numbers you need to know:

• Contract Multiplier: 100 tons per lot
• Tick Size: 0.2 RMB per ton
• Tick Value: 20 RMB per tick (0.2 x 100)
• Exchange: Zhengzhou Commodity Exchange (ZCE)

Why does this matter? Because a 10 RMB move in the underlying price equals a 1,000 RMB swing per lot. During the 2021 bull run, daily limit moves were expanded by the exchange to accommodate volatility, meaning daily swings of 100+ RMB were happening. If you didn't size your positions based on these multipliers, a single bad entry could trigger a margin call before lunch.

The Trend Follower's Playbook: Riding the Parabola

So, how does a trend follower approach a market that looks like a heart monitor? They rely on two things: breakout entries and volatility-based position sizing.

1. The Breakout Entry

Instead of predicting the top, trend followers wait for the market to show its hand. A classic approach is using a Donchian Channel breakout. The rule is simple: if the market makes a 20-day high, you go long. In a market like thermal coal in 2021, this rule kept you on the long side for months. You weren’t buying the bottom, but you were capturing the meat of the move.

2. Volatility-Based Position Sizing

This is where retail traders usually fail. They trade one lot because that’s what their account size allows, ignoring the fact that volatility has tripled. A professional trend follower uses the Average True Range (ATR) to size positions.

Rule of thumb: Risk no more than 1% to 2% of your account equity on a single trade.

For example, if your account is $10,000, your max risk is $100 (1%). If thermal coal has a 20-day ATR of 40 RMB, your stop loss might be placed at 2x ATR below the entry (80 RMB). An 80 RMB move on a 100-ton contract equals 8,000 RMB (roughly $1,200). To risk just $100, you cannot trade a full lot. You would need to size down or trade fractional lots if your broker allows it. This math is non-negotiable if you want to survive parabolic markets.

The Reversal: When the NDRC Steps In

Every parabolic trend eventually ends, and in China, they often end with government intervention. In late October 2021, the National Development and Reform Commission (NDRC) aggressively stepped in to cool prices, threatening to investigate price manipulation and boosting supply guarantees. The market crashed spectacularly, dropping limit-down for several consecutive sessions.

This is where trend followers truly earned their keep. The discretionary top-picker might have eventually been right about the reversal, but they were likely already bankrupt from trying to short it too early. The trend follower, meanwhile, was sitting on massive unrealized profits.

How did they survive the crash? Trailing stops.

A trend follower doesn’t use profit targets. They use trailing stops—perhaps a 10-day low or a 3x ATR trailing stop. When the NDRC news hit and the market gapped down, the trailing stop was triggered. The trend follower exited with a massive win, completely sidestepping the temptation to hold on and “see what happens.” They didn’t catch the exact top, but they didn’t need to. They captured the trend, let the market take them out, and moved on.

Practical Application: Adapting This to Other Markets

The beauty of trend following is its portability. The exact same logic used to ride thermal coal in 2021 applies to other Chinese commodity futures today. Whether you want to trade rebar/iron ore, copper, or soybean meal, the framework remains identical:

• Define your entry: Use a 20-day or 55-day breakout.
• Define your stop: Use 2x or 3x the 20-day ATR.
• Size your position: Calculate your contract multiplier, tick value, and stop distance to ensure you only risk 1-2% of your equity.
• Exit logically: Trail your stop and let the market take you out. Never use hard profit targets on trend following systems.

Trading China futures offers incredible opportunities due to the sheer volume and distinct macro drivers of the market. But the volatility that creates those opportunities will punish undisciplined sizing. You must respect the contract specs and let the system do the heavy lifting.

Conclusion: Test Your Edge Before You Risk Your Capital

The 2021 thermal coal rally is a perfect reminder that you don't need to predict the future to be a profitable trader. You just need a robust system, an understanding of your instrument's mechanics, and the discipline to follow your rules when the market goes crazy.

If you have a trend following system—or any systematic approach—you need to test it against real market conditions. Reading about breakouts is one thing; executing them when volatility is spiking is another. You can test your trading system on a real-data China futures evaluation at XS Select, with evaluation plans starting from $29. Prove your strategy works in the Chinese commodity markets, track your metrics, and see if your edge holds up when the next parabolic trend arrives.