This is the Instantaneous Trendline Trigger described in Chapter 3.  This is a leading indicator that is created by adding a two-day momentum of the Instantaneous Trendline to the Instantaneous Trendline itself.  This indicator may be used with the Cyber3_ITrend indicator to create a trading system.

PriceIn - defaults to Close but change to the Price indicator to match the book

alpha – defaults to 0.07 as described in the book

For more information on this indicator, refer to Chapter 3 of "Cybernetic Analysis for Stocks and Futures" by John Ehlers, Publisher: John Wiley & Sons; (March 19, 2004), ISBN: 0471463078.