diff --git a/backend_api_python/app/services/ibkr_trading/client.py b/backend_api_python/app/services/ibkr_trading/client.py
index d311b0b69..40b3cdf1d 100644
--- a/backend_api_python/app/services/ibkr_trading/client.py
+++ b/backend_api_python/app/services/ibkr_trading/client.py
@@ -56,7 +56,7 @@ def _ensure_ib_insync():
 class IBKRConfig:
     """IBKR connection configuration."""
     host: str = "127.0.0.1"
-    port: int = 7497  # TWS Live:7496, TWS Paper:7497, Gateway Live:4001, Gateway Paper:4002
+    port: int = 7497  # TWS Live:7496, TWS Paper:7497 (IB defaults), Gateway Live:4001, Gateway Paper:4002
     client_id: int = 1
     readonly: bool = False
     account: str = ""  # Leave empty to auto-select first account
@@ -80,7 +80,7 @@ class IBKRClient:
     Interactive Brokers Trading Client
     
     Usage:
-        config = IBKRConfig(port=7497)  # TWS Paper default
+        config = IBKRConfig(port=7497)  # IB default for TWS Paper
         client = IBKRClient(config)
         
         if client.connect():
diff --git a/backend_api_python/app/services/live_trading/factory.py b/backend_api_python/app/services/live_trading/factory.py
index c831cc354..3366e7888 100644
--- a/backend_api_python/app/services/live_trading/factory.py
+++ b/backend_api_python/app/services/live_trading/factory.py
@@ -283,7 +283,7 @@ def create_ibkr_client(exchange_config: Dict[str, Any]):
 
     exchange_config should contain:
     - ibkr_host: TWS/Gateway host (default: 127.0.0.1)
-    - ibkr_port: TWS/Gateway port (default: 7497 = TWS Paper; TWS Live default is 7496)
+    - ibkr_port: TWS/Gateway port (default 7497 = TWS Paper per IB; Live TWS default 7496)
     - ibkr_client_id: Client ID (see below — must not collide with /api/ibkr UI)
     - ibkr_account: Account ID (optional, auto-select if empty)
 
diff --git a/docs/IBKR_TRADING_GUIDE_EN.md b/docs/IBKR_TRADING_GUIDE_EN.md
index 24a2b425e..aaa34888e 100644
--- a/docs/IBKR_TRADING_GUIDE_EN.md
+++ b/docs/IBKR_TRADING_GUIDE_EN.md
@@ -27,7 +27,7 @@ pip install ib_insync
 | TWS    | 7496      | 7497       |
 | IB Gateway | 4001  | 4002       |
 
-> Per IBKR TWS API defaults: production TWS uses **7496**, paper TWS uses **7497**. Ports are configurable in TWS/Gateway, so your client must match the value shown under API settings.
+> Per [IB TWS API Initial Setup](https://interactivebrokers.github.io/tws-api/initial_setup.html): production TWS defaults to **7496**, paper TWS to **7497**. Ports are configurable in TWS/Gateway — your client must match the value shown under API → Settings.
 
 ## TWS / IB Gateway Configuration
 
@@ -117,7 +117,7 @@ GET  /api/ibkr/quote?symbol=AAPL&marketType=USStock
 ```bash
 curl -X POST http://localhost:5000/api/ibkr/connect \
   -H "Content-Type: application/json" \
-  -d '{"host": "127.0.0.1", "port": 7497, "clientId": 1}'  # TWS Paper default
+  -d '{"host": "127.0.0.1", "port": 7497, "clientId": 1}'  # 7497 = TWS Paper default
 ```
 
 ### Place Order