D-Trend Channel is a Donchian Channel based support and resistance channel set. It consists of a mean line and 3 channels calculated based on the highest high and lowest low of the period scaled by the offset parameter. For the documentation and error reporting please visit the D-Trend Channel Forum Page on the Bookmap Forum.   Disclaimer This product / software tool is developed by Zoltan Csoka, an independent person / entity that is in no manner affiliated with Bookmap Ltd. or any of its affiliates. Bookmap Ltd. and its affiliates do not endorse, recommend or approve Zoltan Csoka, or any of its products or trading software tool. No offer or solicitation to buy or sell securities, securities derivatives or futures products of any kind, or any type of trading or investment advice, recommendation or strategy, is made, given or in any manner endorsed by Bookmap Ltd. or any of its affiliates, and no specific trading recommendation or advice is or will be given to any individual by or through the Zoltan Csoka’s products or software tools. All descriptions of Zoltan Csoka’s products / software tools and the indication or strategies they are designed to run are provided by Zoltan Csoka and not by Bookmap Ltd. or any of its affiliates. Customers interested in learning more about, or investigating the quality of, any such product must contact Zoltan Csoka – no person employed by, or associated with Bookmap Ltd. or any of its affiliates is authorized to provide any information about any such product.