Build-a-Strategy Challenge: Test Trading Rules
Build the rules. Face unseen data.
Choose daily EMA entry and exit rules, test them on a training period, then lock them for a separate hidden evaluation period.
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Indicators & overlays
Calculated from daily closes, with up to 250 earlier sessions for initialization. Bollinger Bands use a simple average and population standard deviation; RSI uses Wilder smoothing. The 40/80-candle view changes the display, not the calculations. Future indicator values appear only after you answer.