← Back to Blog · 2026-09-02 · 5 min read · Strategy Case Study

Picture this: you are watching a market go completely vertical. It doubles in a matter of weeks, gaps up overnight, and hits limit-up on a daily basis. You are either kicking yourself for not being in the trade, or sweating bullets trying to manage a position that feels like it could explode at any moment. Welcome to the 2021 thermal coal market on the Zhengzhou Commodity Exchange (ZCE).

For global retail traders, the China futures market can sometimes feel like a black box. But the mechanics of a parabolic trend—and the psychological toll it takes—are universal. Today, we are going to break down exactly how a mechanical trend-following strategy would have handled the historic 2021 thermal coal rally. We will look at the concrete contract specs, the entry logic, the reality of limit-up/limit-down moves, and the violent reversal that followed. No fluff, just actionable trading logic.

The Anatomy of the 2021 Thermal Coal Monster

In late 2021, global energy markets were in chaos, and China was no exception. A perfect storm of post-pandemic industrial demand, supply constraints, and weather-related hydro shortfalls created a massive power crunch. Thermal coal—the primary fuel for China's power plants—went on an unprecedented run. Prices roughly tripled from their earlier yearly baselines, eventually peaking somewhere around the 1,800 to 2,000 RMB per ton mark before state interventions triggered a catastrophic collapse back to reality.

For a trend follower, a market like this is the holy grail. It’s the kind of move that pays for an entire year of chop and false breakouts. But surviving it requires a system built on concrete rules, not gut feelings.

Contract Specs: The Reality of Trading ZCE Thermal Coal

Before we talk strategy, you have to understand the instrument. Trading Chinese commodity futures means dealing with specific exchange rules that dictate your risk. Thermal coal (ticker: TC) trades on the Zhengzhou Commodity Exchange. Here are the approximate specs as they stood during that volatile period:

Because the multiplier is 100 tons, a 1 RMB move in the underlying price equals a 100 RMB fluctuation in your PnL per lot. When the market is moving 50 to 100 RMB in a single session, a single lot can swing 5,000 to 10,000 RMB. This extreme volatility means position sizing is everything. If you get this wrong, a single limit-down day will liquidate your account before you even have a chance to place a stop-loss order.

Building the Rules: A Donchian Channel Approach

To capture a move like the 2021 thermal coal rally, we need a system that gets you in when the trend starts and keeps you in until the trend is undeniably broken. A classic 20-day Donchian Channel breakout is perfect for this. It’s the same logic that legendary trend followers have used for decades across global markets.

Entry Logic

• Setup: Monitor the continuous front-month contract for ZCE Thermal Coal.
• Long Entry: Buy one tick above the highest high of the previous 20 trading days.
• Filter: Ensure the 50-day Exponential Moving Average (EMA) is sloping upward to confirm the broader macro trend is intact.

During the early stages of the 2021 rally, a 20-day breakout would have triggered reliably. The market wasn't just moving up; it was accelerating. The key here is that you don't try to predict the top. You simply react to price action.

Position Sizing and Stop-Loss

This is where retail traders usually blow up. In a parabolic market, standard percentage stops will get you whipsawed out immediately. You must use volatility-based position sizing.

• Volatility Metric: Calculate the 20-day Average True Range (ATR) of the thermal coal contract.
• Stop-Loss Placement: Place your initial stop-loss at 2x ATR below your entry price.
• Position Size: Risk a maximum of 1% of your total account equity per trade. If your account is $10,000, your max risk is $100. You calculate the number of lots to trade by dividing your max risk by the monetary value of your 2x ATR stop.

Because ATR expands dramatically during a coal rally, your position size will naturally shrink as volatility spikes. This is a feature, not a bug. It keeps you in the trade without exposing you to ruinous drawdowns.

Managing the Parabola and the Inevitable Reversal

Getting into the trade is the easy part. Staying in it as thermal coal goes limit-up day after day is where the psychology gets tough. In the China futures market, daily price limits mean the market can lock at its maximum allowable price for the day. If you are long, this is amazing—your profit is running and you literally cannot lose money for the rest of the session. But it also means you cannot add to your position at better prices.

As the trend matures, you must trail your stop. A standard approach is a 10-day trailing low. You move your stop-loss to rest just below the lowest low of the previous 10 trading days. This allows the market to breathe through normal pullbacks but gets you out quickly when the trend actually breaks.

The 2021 thermal coal rally didn't end with a gentle distribution. It ended with a bang. Exchange interventions, margin hikes, and policy directives caused the market to crash violently, resulting in consecutive limit-down moves.

This is the nightmare scenario for a trend follower. If your trailing stop is hit, but the market is locked limit-down, you cannot exit. Your order sits in the queue, and you take the loss on the next available trading day. This is exactly why the 1% risk rule is non-negotiable. If you risked 5% on the trade, a few locked limit-down days would wipe out a quarter of your account. By risking 1%, a gap against you is a manageable bruise, not a death blow.

Translating This to Other Chinese Commodity Futures

The beauty of a robust trend-following system is its portability. The exact same logic—20-day breakouts, ATR-based stops, 1% risk—applies across the board when you trade rebar/iron ore or any other liquid contract on Chinese exchanges.

For instance, iron ore on the Dalian Commodity Exchange (DCE) has a multiplier of 100 tons/lot and is notoriously volatile. Rebar on the Shanghai Futures Exchange (SHFE) trades in 10 tons/lot and often exhibits strong, persistent macro trends driven by infrastructure spending. When you apply the Donchian channel approach to these markets, you are systematically capturing the exact type of explosive moves that Chinese commodity futures are known for.

The adjustments you need to make are purely mechanical: update the contract multipliers, recalculate the tick values, and let the ATR dictate your lot sizes. The core philosophy remains identical: cut your losses ruthlessly, let your winners run, and never try to predict the top.

Practical Application: Testing Your Edge

Reading about a strategy is one thing; executing it under live market pressure is another. The 2021 thermal coal rally tested traders' discipline to the absolute limit. Could you have held a position through multiple limit-up days without prematurely taking profits? Could you have accepted the slippage of a limit-down reversal without abandoning your system?

If you want to find out how your system handles the unique volatility of the China futures market, you need to test it in a structured environment. At XS Select, we provide a real-data China futures evaluation platform where you can run your strategies, prove your risk management skills, and see if your edge holds up. You can start a futures evaluation from just $29, giving you the opportunity to trade like a professional without risking your entire bankroll on day one.

Build your rules, respect the specs, and let the trend do the heavy lifting.