1. What is a filter indicator and how it can be used 2. Example demonstration of Relative Bandwidth Filter to define trade no-trade zones based on volatility. 3. How to use filters along with Auto Harmonic Pattern UltimateX or any other script which follows similar design for external filters. 4. How to develop your own filter based on different conditions which can be used with AHPUx or other scripts which are designed to use the Filters.