Some background and history
The ADX indicator is a unique indicator because of the amazing information it provides. It tells you whether the market is trending, has stopped trending and shows the strength of the trend. It also tells you direction of the trend and when the trend changes. Many trading strategies also use it as a trendiness indicator.
One of the most successful Expert4x trading robots uses the ADX indicator as trend filter. So Expert4x decided to automated it. Expert4x added some turbo charged techniques such as the multiplier and pruning. The back testing results were quite amazing.
Further details
See the Expert4x theTradeableADX EA page for more information.