1 files changed, 8 insertions, 9 deletions
diff --git a/services/backtester/tests/test_metrics.py b/services/backtester/tests/test_metrics.py
index b222b8a..68bc0b5 100644
--- a/services/backtester/tests/test_metrics.py
+++ b/services/backtester/tests/test_metrics.py
@@ -1,4 +1,6 @@
 """Tests for detailed backtest metrics."""
+
+import math
 from datetime import datetime, timedelta, timezone
 from decimal import Decimal
 
@@ -21,9 +23,9 @@ def test_compute_metrics_basic():
     """Two round-trip trades: 1 win, 1 loss. Verify counts and win_rate."""
     trades = [
         _make_trade("BUY", "100", 0),
-        _make_trade("SELL", "120", 10),   # win: +20
+        _make_trade("SELL", "120", 10),  # win: +20
         _make_trade("BUY", "130", 20),
-        _make_trade("SELL", "110", 30),   # loss: -20
+        _make_trade("SELL", "110", 30),  # loss: -20
     ]
     metrics = compute_detailed_metrics(trades, Decimal("10000"), Decimal("10000"))
 
@@ -37,9 +39,9 @@ def test_compute_metrics_profit_factor():
     """Verify profit_factor = gross_profit / gross_loss."""
     trades = [
         _make_trade("BUY", "100", 0),
-        _make_trade("SELL", "150", 10),   # win: +50
+        _make_trade("SELL", "150", 10),  # win: +50
         _make_trade("BUY", "150", 20),
-        _make_trade("SELL", "130", 30),   # loss: -20
+        _make_trade("SELL", "130", 30),  # loss: -20
     ]
     metrics = compute_detailed_metrics(trades, Decimal("10000"), Decimal("10030"))
 
@@ -51,9 +53,9 @@ def test_compute_metrics_max_drawdown():
     """Max drawdown should be > 0 when there is a losing trade after a peak."""
     trades = [
         _make_trade("BUY", "100", 0),
-        _make_trade("SELL", "150", 10),   # win: equity goes up
+        _make_trade("SELL", "150", 10),  # win: equity goes up
         _make_trade("BUY", "150", 20),
-        _make_trade("SELL", "120", 30),   # loss: equity drops
+        _make_trade("SELL", "120", 30),  # loss: equity drops
     ]
     metrics = compute_detailed_metrics(trades, Decimal("10000"), Decimal("10020"))
 
@@ -91,6 +93,3 @@ def test_compute_metrics_empty_trades():
     assert metrics.calmar_ratio == 0.0
     assert metrics.max_drawdown == 0.0
     assert metrics.monthly_returns == {}
-
-
-import math