feat: initial trading platform implementation

Binance spot crypto trading platform with microservices architecture:
- shared: Pydantic models, Redis Streams broker, asyncpg DB layer
- data-collector: Binance WebSocket/REST market data collection
- strategy-engine: Plugin-based strategy execution (RSI, Grid)
- order-executor: Order execution with risk management
- portfolio-manager: Position tracking and PnL calculation
- backtester: Historical strategy testing with simulator
- cli: Click-based CLI for all operations
- Docker Compose orchestration with Redis and PostgreSQL
- 24 test files covering all modules

3 files changed, 89 insertions, 0 deletions

diff --git a/services/portfolio-manager/tests/__init__.py b/services/portfolio-manager/tests/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/services/portfolio-manager/tests/__init__.py
diff --git a/services/portfolio-manager/tests/test_pnl.py b/services/portfolio-manager/tests/test_pnl.py
new file mode 100644
index 0000000..4462adc
--- /dev/null
+++ b/services/portfolio-manager/tests/test_pnl.py
@@ -0,0 +1,32 @@
+"""Tests for PnL calculation functions."""
+from decimal import Decimal
+
+from portfolio_manager.pnl import calculate_realized_pnl, calculate_unrealized_pnl
+
+
+def test_unrealized_pnl_profit() -> None:
+    result = calculate_unrealized_pnl(
+        quantity=Decimal("0.1"),
+        avg_entry_price=Decimal("50000"),
+        current_price=Decimal("55000"),
+    )
+    assert result == Decimal("500")
+
+
+def test_unrealized_pnl_loss() -> None:
+    result = calculate_unrealized_pnl(
+        quantity=Decimal("0.1"),
+        avg_entry_price=Decimal("50000"),
+        current_price=Decimal("45000"),
+    )
+    assert result == Decimal("-500")
+
+
+def test_realized_pnl_single_trade() -> None:
+    result = calculate_realized_pnl(
+        buy_price=Decimal("50000"),
+        sell_price=Decimal("55000"),
+        quantity=Decimal("0.1"),
+        fee=Decimal("5.5"),
+    )
+    assert result == Decimal("494.5")
diff --git a/services/portfolio-manager/tests/test_portfolio.py b/services/portfolio-manager/tests/test_portfolio.py
new file mode 100644
index 0000000..26319ca
--- /dev/null
+++ b/services/portfolio-manager/tests/test_portfolio.py
@@ -0,0 +1,57 @@
+"""Tests for PortfolioTracker."""
+from decimal import Decimal
+
+from shared.models import Order, OrderSide, OrderStatus, OrderType
+from portfolio_manager.portfolio import PortfolioTracker
+
+
+def make_order(side: OrderSide, price: str, quantity: str) -> Order:
+    """Helper to create a filled Order."""
+    return Order(
+        signal_id="test-signal",
+        symbol="BTC/USDT",
+        side=side,
+        type=OrderType.MARKET,
+        price=Decimal(price),
+        quantity=Decimal(quantity),
+        status=OrderStatus.FILLED,
+    )
+
+
+def test_portfolio_add_buy_order() -> None:
+    tracker = PortfolioTracker()
+    order = make_order(OrderSide.BUY, "50000", "0.1")
+    tracker.apply_order(order)
+
+    position = tracker.get_position("BTC/USDT")
+    assert position is not None
+    assert position.quantity == Decimal("0.1")
+    assert position.avg_entry_price == Decimal("50000")
+
+
+def test_portfolio_add_multiple_buys() -> None:
+    tracker = PortfolioTracker()
+    tracker.apply_order(make_order(OrderSide.BUY, "50000", "0.1"))
+    tracker.apply_order(make_order(OrderSide.BUY, "52000", "0.1"))
+
+    position = tracker.get_position("BTC/USDT")
+    assert position is not None
+    assert position.quantity == Decimal("0.2")
+    assert position.avg_entry_price == Decimal("51000")
+
+
+def test_portfolio_sell_reduces_position() -> None:
+    tracker = PortfolioTracker()
+    tracker.apply_order(make_order(OrderSide.BUY, "50000", "0.2"))
+    tracker.apply_order(make_order(OrderSide.SELL, "55000", "0.1"))
+
+    position = tracker.get_position("BTC/USDT")
+    assert position is not None
+    assert position.quantity == Decimal("0.1")
+    assert position.avg_entry_price == Decimal("50000")
+
+
+def test_portfolio_no_position_returns_none() -> None:
+    tracker = PortfolioTracker()
+    position = tracker.get_position("ETH/USDT")
+    assert position is None