Example: Using cascaded technical indicators

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

The example shows how to set up and use two Exponential Moving Average (EMA) indicators in a cascaded manner, where the second indicator (EMA-20) is calculated using values from the first indicator (EMA-10), demonstrating proper initialization, updating, and accessing indicator values in a cascaded setup.

What this example demonstrates:

• Creating and configuring multiple technical indicators (EMAs).
• Setting up a cascaded indicator relationship.
• Registering the primary indicator to receive bar data.
• Manually updating the cascaded indicator.
• Storing and accessing historical values for both indicators.
• Proper handling of indicator initialization in a cascaded setup.