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app/schemas/indicator.py

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+"""Pydantic schemas for technical indicator endpoints."""
+
+from __future__ import annotations
+
+from datetime import date
+from typing import Any, Literal
+
+from pydantic import BaseModel, Field
+
+
+class IndicatorRequest(BaseModel):
+    """Query parameters for indicator computation."""
+
+    start_date: date | None = None
+    end_date: date | None = None
+    period: int | None = None
+
+
+class IndicatorResult(BaseModel):
+    """Raw indicator values plus normalized score."""
+
+    indicator_type: str
+    values: dict[str, Any]
+    score: float = Field(ge=0, le=100)
+    bars_used: int
+
+
+class IndicatorResponse(BaseModel):
+    """Envelope-ready indicator response."""
+
+    symbol: str
+    indicator: IndicatorResult
+
+
+class EMACrossResult(BaseModel):
+    """EMA cross signal details."""
+
+    short_ema: float
+    long_ema: float
+    short_period: int
+    long_period: int
+    signal: Literal["bullish", "bearish", "neutral"]
+
+
+class EMACrossResponse(BaseModel):
+    """Envelope-ready EMA cross response."""
+
+    symbol: str
+    ema_cross: EMACrossResult