Example: Simple use of technical indicators

This example demonstrates how to use technical indicators in a NautilusTrader strategy.

The example shows how to set up and use a simple Exponential Moving Average (EMA) indicator within a trading strategy, demonstrating proper initialization, updating, and accessing latest / previous indicator values.

What this example demonstrates:

• Creating and configuring a technical indicator (EMA).
• Registering the indicator to receive bar data.
• Accessing indicator values in the strategy.
• Storing historical indicator values.
• Accessing latest / previous indicator values.