The Symbol Normalization feature enables you to use unique symbol (service monitor created symbol) for multi-leg securities. In the absence of this feature, you must give several tag values for each user request (Subscription, NewOrder, AmendOrder, CancelOrder) and must write several "if" conditions to uniquely identify the response event. This new feature reduces the task by providing a mapped_symbol so that all the interaction of the application with the service monitor can then be through this mapped_symbol. The service monitors will take care of to and fro translation of security definition and mapped symbol.