Initial commit: Forex Indicator Telegram Bot MVP

Multi-indicator signal engine with RSI, MACD, Bollinger Bands,
EMA trend filter, ADX strength gate, Stochastic, ATR, and
higher-timeframe trend confirmation. Twelve Data API client
with in-memory cache and rate limiting.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

config.py

@@ -0,0 +1,19 @@
+"""Configuration loaded from environment variables."""
+from __future__ import annotations
+
+import os
+from dotenv import load_dotenv
+
+load_dotenv()
+
+TELEGRAM_TOKEN: str = os.getenv("TELEGRAM_TOKEN", "")
+TWELVE_DATA_API_KEY: str = os.getenv("TWELVE_DATA_API_KEY", "")
+
+SUPPORTED_PAIRS: list[str] = ["EURUSD", "GBPUSD", "USDJPY", "AUDUSD", "USDCAD", "XAUUSD"]
+SUPPORTED_TIMEFRAMES: list[str] = ["15min", "1h", "4h", "1day"]
+
+if not TELEGRAM_TOKEN or not TWELVE_DATA_API_KEY:
+    raise RuntimeError(
+        "Missing TELEGRAM_TOKEN or TWELVE_DATA_API_KEY. "
+        "Copy .env.example to .env and fill in values."
+    )