perf: limit trend directional movement scan

[ShauryaMallampati]

Refs #2.

Summary

• optimize MarketAnalyzer trend metrics by computing only the final 14 directional-movement values used by the simplified ADX calculation
• avoid building full plus/minus DM arrays for the entire medium window on each feature computation
• add regression coverage comparing the optimized path against the previous full-array calculation

Benchmark

Local synthetic OHLCV inputs, best of 5 repeats:

• 2,016 medium candles / 5,000 calls: old 2.147981s vs new 0.040188s, 53.45x faster
• 2,016 medium candles / 1,000 calls: old 0.430773s vs new 0.008103s, 53.16x faster

Validation

• .venv/bin/python -m pytest shared/tests/test_market_analysis.py -q
• .venv/bin/python -m py_compile app/market/market_analysis.py shared/tests/test_market_analysis.py
• git diff --check

[vercel]

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[ShauryaMallampati]

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Local validation for this patch:

• .venv/bin/python -m pytest shared/tests/test_market_analysis.py -q -> 2 passed
• .venv/bin/python -m py_compile app/market/market_analysis.py shared/tests/test_market_analysis.py
• git diff --check

[Copilot]

Pull request overview

This PR optimizes MarketAnalyzer trend-metric computation by avoiding full-window directional-movement array materialization and instead aggregating only the final values needed for the simplified ADX calculation, with a new regression test intended to validate equivalence vs the prior approach.

Changes:

• Optimize simplified ADX directional-movement computation by summing only the last 14 deltas instead of building full plus_dm/minus_dm arrays.
• Add a reference implementation in tests and compare optimized vs full-array behavior for both long and short windows.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
app/market/market_analysis.py	Limits directional-movement scanning to the last 14 deltas and computes ADX from rolling sums instead of full arrays.
shared/tests/test_market_analysis.py	Adds regression tests that compare the optimized trend-metrics path against a reference full-array calculation.

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[ShauryaMallampati]

Addressed the Copilot review comments in 90c15bd:

• clarified that the simplified ADX path uses up to the final 14 directional-movement values
• moved the regression test into tests/ so it is included by the repo CI command (pytest tests/ ...)

Validation:

• .venv/bin/python -m pytest tests/test_market_analysis.py -q -> 2 passed
• .venv/bin/python -m pytest tests/ -q -> 2 passed
• .venv/bin/python -m py_compile app/market/market_analysis.py tests/test_market_analysis.py
• git diff --check