From 491ef00e314b92c82de286304e6acff029089e6a Mon Sep 17 00:00:00 2001
From: Atharva Joshi <atharvaj2112@gmail.com>
Date: Tue, 28 Apr 2026 01:14:57 -0400
Subject: [PATCH] Fix read-only array error in FractionalBacktest indicator
 scaling

---
 backtesting/lib.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/backtesting/lib.py b/backtesting/lib.py
index fd05026a9..02ff9dd36 100644
--- a/backtesting/lib.py
+++ b/backtesting/lib.py
@@ -552,9 +552,9 @@ def run(self, **kwargs) -> pd.Series:
         trades[['EntryPrice', 'ExitPrice', 'TP', 'SL']] /= self._fractional_unit
 
         indicators = result['_strategy']._indicators
-        for indicator in indicators:
+        for i, indicator in enumerate(indicators):
             if indicator._opts['overlay']:
-                indicator /= self._fractional_unit
+                indicators[i] = indicator / self._fractional_unit
 
         return result