This is the Instantaneous Trendline indicator described in Chapter 3.  According to Ehlers, "having an Instantaneous Trendline with zero lag is a good beginning to generate a responsive trend-following system."  This indicator may be used with the Cyber3_ITrendTrigger 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.