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S&P 400 MidCap Uptrend Replay (2021-03-24 to 2021-05-07)

StocksS&P MidCap 400USRally2021-03 to 2021-05Difficulty 2/5FreeView charts

Replay 64 daily bars of the S&P 400 MidCap rally from March to May 2021, when prices climbed 6.4% from 2564.02 to 2727.44. You make the calls at 11 decision points, four of them critical, then receive an AI coach review on each simulated trade.

64K lines
11Decision points
2Difficulty
DailyGranularity

64 daily bars · 11 decision points · 2021-03 to 2021-05 · Stocks

Key facts

This window spans 88 days with a peak-to-trough drawdown of 6.2% and a 12.9% run-up.

Max drawdown
−6.2%
Max run-up
+12.9%
Duration
88 days
Largest single-day move
−3.1%
Bars
64 Daily bars
Decision points
11

Every figure above is computed programmatically from this replay’s own candle series — no editorial input, no LLM. Methodology: Methodology

How to play
  1. The market advances day by day. You only see candles up to the current day — as if you were really there.

  2. At key decision points choose Buy / Trim / Exit / Hold. Each decision advances the timeline by one day.

  3. 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 S&P 400 MidCap index in early 2021 occupied a nuanced position between large-cap stability and small-cap speculation, navigating post-pandemic recovery while facing questions about economic reopening pace and monetary policy direction. From 2021-03-01 to 2021-05-28, traders confronted a 64-daily-bar replay of this mid-cap rally, where 11 decision points tested their ability to read directional shifts and maintain conviction through uncertainty. The scenario's four critical moments were designed to force choices that separate disciplined practitioners from reactive ones.

Prices climbed from 2564.02 to 2727.44, delivering a 6.4% gain across those 64 bars. Yet the journey proved anything but linear—max drawdown reached 6.2%, and individual bars moved as much as 3.1%, creating recurring inflection points where directional conviction was tested. Each pullback asked whether the underlying trend remained intact; each sharp move demanded calibration between signal and noise.

This replay trains the decision-making process under real market conditions: recognizing momentum versus mean reversion, managing risk through drawdowns without abandoning sound thesis, and acting decisively at critical junctures. The 2020s context reminds traders that similar episodic rallies will recur, requiring the same combination of preparation, discipline, and psychological resilience to navigate them effectively.