- Time range buttons: 30D, 90D, 6M, 1Y, 2Y, 4Y, ALL
- BTC price overlay on right y-axis (orange dashed line)
- Accumulation zone backgrounds (green/yellow/red shading)
- Threshold lines at 65, 50, 35
- Tooltip shows score + zone label + BTC price
- Uses backtest daily_scores for full history (not just score_history.jsonl)
- Smart downsampling: daily for last 2yr, weekly before that
- Chart height increased to 320px