docs

docs/Interfaces.md

@@ -3,6 +3,7 @@ title: Common interfaces
 nav_order: 5
 ---
 
+## Shared interfaces
 Clients have a common interface implementation to allow a shared code base to use the same functionality for different exchanges. The interface is implemented at the `API` level, for example:
 ```csharp
 var binanceClient = new BinanceClient();