Add configurable data providers and localize frontend UI

backend/tests/test_technical_signals.py

@@ -0,0 +1,22 @@
+# -*- coding: utf-8 -*-
+"""Tests for structured technical analyzer."""
+
+import pandas as pd
+
+from backend.tools.technical_signals import StockTechnicalAnalyzer
+
+
+def test_technical_analyzer_detects_bullish_trend():
+    df = pd.DataFrame(
+        {
+            "time": pd.date_range("2024-01-01", periods=40, freq="D"),
+            "close": [100 + i for i in range(40)],
+        },
+    )
+    analyzer = StockTechnicalAnalyzer()
+
+    result = analyzer.analyze("AAPL", df)
+
+    assert result.current_price == 139.0
+    assert result.trend in {"BULLISH", "STRONG BULLISH"}
+    assert result.momentum_20d_pct > 0