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← Back to Blog · 2026-10-20 · 6 min read · Challenge Guide

Most traders fail prop firm challenges not because they can’t read a chart, but because they can’t do the math.

You’ve seen the numbers before. A 29% profit target. A 5% maximum drawdown. On paper, it looks like a simple race: make money, don’t lose too much. But in the high-volatility world of Chinese commodity futures, where rebar can gap 3% overnight and iron ore swings on a single policy tweet, treating these numbers as suggestions rather than hard constraints is a suicide mission.

At XS Select, we evaluate traders on real market data from the Shanghai Futures Exchange (SHFE) and Dalian Commodity Exchange (DCE). We see a recurring pattern: traders with excellent technical skills fail because their position sizing is disconnected from their drawdown limits. They aim for the 29% target by swinging for the fences, only to trip the 5% circuit breaker on a routine Tuesday morning.

Here is the brutal truth: You cannot hit a 29% target with a 5% drawdown limit using standard retail position sizing. You need a surgical approach. You need a plan that prioritizes survival over heroics. This guide breaks down the exact mechanics of designing that plan.

Reverse Engineering the Risk Budget

Let’s start with the most critical mistake: assuming you have 5% to lose. You don’t. If your max drawdown is 5%, and you hit 4.9%, you are one tick away from failure. In a futures evaluation, the buffer is your oxygen. If you use it all, you suffocate.

For a 29% target, you need to think in terms of Return-to-Risk Ratios. To reach 29%, you need a net gain of nearly six times your maximum allowed loss. This implies that your average winning trade must be significantly larger than your average losing trade, or your win rate must be exceptionally high.

Let’s look at the math. If you risk 0.5% per trade (which is already aggressive for a 5% total drawdown limit), you can only afford 10 consecutive losses before failing. But let’s be real: no strategy has a 0% loss streak risk. In reality, you should aim to risk no more than 0.2% to 0.3% per trade. Why? Because this gives you 16–25 losses before you breach the 5% limit. This buffer allows you to survive normal market noise without panic-selling.

The Golden Rule: Your max drawdown limit is not a target. It is a cliff edge. Stay 2% away from it at all times.

Contract Specifications: The Hidden Killers

In US futures, you might trade ES or NQ with $50 or $20 tick values. In China futures, the tick values are different, and the leverage is often higher. If you don’t know the exact tick value of the contracts you are trading, you are flying blind.

Let’s look at two of the most popular contracts for traders looking to trade rebar and iron ore:

Rebar (RB) on SHFE

Iron Ore (I) on DCE

Notice the difference. One tick on Iron Ore costs you 50 RMB. One tick on Rebar costs you 10 RMB. If you size your Iron Ore position the same way you size your Rebar position, you are risking five times more capital per point move. This is where many traders blow up. They treat all futures contracts as equal. They are not.

When designing your plan, calculate your "Dollar Risk per Tick." If your account is $10,000 (approx. 72,000 RMB), and you risk 0.3% ($30 or ~216 RMB), you can only afford a 4-tick stop loss on Iron Ore. That is incredibly tight. For Rebar, you can afford a 21-tick stop loss. This means Rebar is more forgiving for scalpers, while Iron Ore requires wider stops or smaller position sizes to survive the volatility.

Position Sizing: The Dynamic Approach

Fixed lot sizing is a trap in a prop firm challenge. If you trade 5 lots of Rebar when you are up 10%, and 5 lots when you are up 1%, you are not managing risk; you are gambling with your equity curve.

Instead, use dynamic position sizing based on remaining drawdown buffer. Here is a practical formula:

  1. Calculate Available Risk: Subtract your current drawdown from 4% (leaving a 1% buffer). If you are down 1%, you have 3% available risk.
  2. Define Stop Loss in Ticks: Based on your strategy’s historical average adverse excursion (MAE).
  3. Calculate Lot Size: Available Risk ($) / (Stop Loss Ticks × Tick Value × Exchange Rate).

For example, if you are trading Rebar with a 20-tick stop loss and a tick value of 10 RMB, each lot risks 200 RMB (~$28). If you have $300 of risk remaining, you can trade 10 lots. But if you are already down 2%, and only have $100 of risk remaining, you must drop to 3 lots. This ensures that a losing streak does not accelerate your failure.

Strategy Selection: Volatility vs. Consistency

Not all strategies work in a 29% / 5% challenge. High-frequency scalping can work, but it requires low slippage and fast execution. Swing trading is dangerous if you hold positions overnight because Chinese markets can gap due to policy announcements.

Remember the 2021 thermal coal rally? Prices went parabolic, then crashed on government intervention. If you were long coal with a tight stop loss, you likely got stopped out on the way up. If you held through the crash, you blew your account. The lesson: Avoid holding through major macro events unless you have a wide buffer.

For this specific challenge profile, we recommend:

Practical Application: A Sample Trading Plan

Let’s put this into a concrete scenario. You are trading a $10,000 China futures evaluation account. Your goal is $2,900 profit. Your max drawdown is $500.

The Rules:

The Math:

If you win 45% of trades with a 1:2 R:R, your expectancy is positive. To reach $2,900, you need roughly 116 net winning trades (assuming $25 risk per trade). That is a lot of trades. You might need to scale up position sizes as your account grows, but never increase risk per trade above 0.3%.

Contract Selection:

Focus on Rebar (RB) and Soybean Meal (M). They are highly liquid, have reasonable tick values, and are less prone to the extreme, overnight gaps seen in energy contracts. Avoid crude oil or gold if you are new to Chinese market hours, as the overnight gaps can be brutal.

Psychology: The 80/20 Rule of Prop Trading

80% of the challenge is psychological. The pressure of the 5% drawdown limit creates anxiety. This anxiety leads to hesitation (missing entries) or overtrading (trying to make back losses quickly).

Accept that you will have losing days. Accept that you might be down 3% halfway through the challenge. If you panic, you will increase your position size to "catch up," and you will fail. The traders who pass these evaluations are not the best predictors of the market; they are the best managers of their own fear.

Stick to your plan. If your system says to exit, exit. If your system says to wait, wait. The market will be there tomorrow. Your account might not be.

Test Your System Before You Risk Real Capital

Theories are nice, but execution is everything. You need to know if your strategy can actually survive the volatility of Chinese commodities under these specific constraints. You need real data, real slippage, and real psychological pressure.

This is exactly why we built XS Select. We offer a futures evaluation platform specifically designed for China futures traders. We provide access to real market data from SHFE and DCE, allowing you to test your risk management and strategy logic in a realistic environment. Whether you are looking to trade rebar or diversify into other Chinese commodity futures, you need a venue that respects the nuances of the market.

You can start testing your system on a real-data China futures evaluation at XS Select from as little as $29. No fluff, no fake promises—just a clean environment to prove your edge. If your plan works, you’ll know. If it doesn’t, you’ll find out before you blow up a real account.

Design the plan. Respect the drawdown. Execute the math. Good luck.

📈 Put it into practice: reading is cheap — trading is the real test. XS Select offers „100K–„1M RMB simulated evaluations on real Chinese futures data, from $29. Pass and earn a 10x bonus plus a 50% profit share. Take the Challenge →