refactor: migrate to US stocks with Alpaca API

- Replace Binance/ccxt with Alpaca REST client (paper + live)
- Add MOC (Market on Close) strategy for overnight gap trading
- Wire sentiment into strategy engine main loop
- Add EMA + bullish candle entry filters to Asian RSI
- Remove crypto-specific exchange factory
- Update config: Alpaca keys replace Binance keys
- 399 tests passing, lint clean

1 files changed, 2 insertions, 0 deletions

diff --git a/shared/tests/test_alpaca.py b/shared/tests/test_alpaca.py
index 7c8eab1..080b7c4 100644
--- a/shared/tests/test_alpaca.py
+++ b/shared/tests/test_alpaca.py
@@ -1,4 +1,5 @@
 """Tests for Alpaca API client."""
+
 import pytest
 from unittest.mock import AsyncMock, MagicMock
 from shared.alpaca import AlpacaClient
@@ -40,6 +41,7 @@ async def test_get_buying_power(client):
 
     result = await client.get_buying_power()
     from decimal import Decimal
+
     assert result == Decimal("10000.00")
     await client.close()