Corn Historical Replay: 2021-02 to 2021-05
Replay a 66-day corn market window where prices surged 40.0% from 552 to 772.75, a rare commodity shock episode. Work through 12 decision points day-by-day in a simulated environment and receive an AI coach review of each choice.
66 daily bars · 12 decision points · 2021-02 to 2021-05 · Commodities
Key facts
This window spans 93 days with a peak-to-trough drawdown of 5.2% and a 44.6% run-up.
- Max drawdown
- −5.2%
- Max run-up
- +44.6%
- Duration
- 93 days
- Largest single-day move
- +5.4%
- Bars
- 66 Daily bars
- Decision points
- 12
Every figure above is computed programmatically from this replay’s own candle series — no editorial input, no LLM. Methodology: Methodology
The market advances day by day. You only see candles up to the current day — as if you were really there.
At key decision points choose Buy / Trim / Exit / Hold. Each decision advances the timeline by one day.
After settlement you get a six-dimension score and an AI coach review. Your result enters the scenario leaderboard.
Event Replay
What happened — and what it teaches
The US grain market in early 2021 presented traders with a high-pressure environment. Corn futures were navigating a complex landscape of shifting supply-demand dynamics, weather uncertainties, and post-pandemic economic recovery. Over the 66-day window from February 3 to May 7, 2021, participants faced a rare commodity shock that would test their ability to read momentum, manage risk, and make decisive choices under pressure. Twelve decision points punctuated this period, four of which represented critical junctures where the direction of capital allocation could define performance.
Prices surged from 552 to 772.75, delivering a 40.0% return over approximately three months. This was no smooth gradient but rather a jagged ascent punctuated by sharp reversals. The largest single-bar move was 5.4%, while the maximum drawdown measured 5.2%, reminding participants that even a strongly trending market extracts its psychological toll. The magnitude and speed of this commodity shock episode made it a stern test of position sizing and emotional discipline.
This scenario trains traders to confront the realities of high-volatility commodity markets. The 12 decision points force clear articulation of entry rationale, stop-loss discipline, and profit-taking logic under conditions where prices can move 5.4% in a single session. The 2021 corn shock is a textbook case for understanding how commodity shocks combine rapid appreciation with abrupt pullbacks, demanding both conviction and flexibility. For educational purposes, this historical window sharpens decision-making reflexes without real capital at stake.
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