diff --git a/tests/backtest/test_custom_labels.py b/tests/backtest/test_custom_labels.py
index 00c62b674..21bf07300 100644
--- a/tests/backtest/test_custom_labels.py
+++ b/tests/backtest/test_custom_labels.py
@@ -94,6 +94,7 @@ def decide_trades(input: StrategyInput) -> list[TradeExecution]:
             pass
 
         # Unit test asserts
+        import ipdb ; ipdb.set_trace()
         assert pair.get_tags() == {"L1", "evm", "bluechip"}
         assert pair.base.get_tags() == {"L1", "evm", "bluechip"}
 
diff --git a/tradeexecutor/state/identifier.py b/tradeexecutor/state/identifier.py
index 155954b16..ee73129c5 100644
--- a/tradeexecutor/state/identifier.py
+++ b/tradeexecutor/state/identifier.py
@@ -78,7 +78,21 @@ class AssetIdentifier:
 
     As internal token_ids and pair_ids may be unstable, trading pairs and tokens are explicitly
     referred by their smart contract addresses when a strategy decision moves to the execution.
-    We duplicate data here to make sure we have a persistent record that helps to diagnose the sisues.
+    We duplicate data here to make sure we have a persistent record that helps to diagnose the issues.
+
+    Setting custom data:
+
+    - Both :py:class:`AssetIdentifier` and :py:class:`TradingPairIdentifier` offer :py:attr:`AssetIdentifier.other_data` allowing you to set custom attribtues.
+
+    - You must set these attributes in `create_trading_universe` function.
+
+    - For more information see `test_custom_labels`.
+
+    Example:
+
+    .. code-block:: python
+
+
     """
 
     #: See https://chainlist.org/