get_signal() now returns (signal, detail) tuple with long/short scores,
ADX value, volume surge status, and HOLD reason for easier diagnosis.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
ADX < 25 now returns HOLD in get_signal(), preventing entries during
trendless (sideways) markets. NaN ADX values fall through to existing
weighted signal logic. Also syncs the vectorized dataset builder with
the same ADX filter to keep training data consistent.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add ADX (Average Directional Index) with period 14 to calculate_all()
for sideways market filtering. Includes test verifying the adx column
exists and contains non-negative values.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
