Chart is Free Software, published under the terms of the GNU General Public License (version 3 or later). The file COPYING contains the full license terms (view it under Help/About within the program).
Chart is not in the public domain. It’s copyrighted and there are restrictions on its distribution and redistribution, but these restrictions are designed to permit everything a cooperating person would want to do.
Essentially you can give or sell copies to anyone, with or without modifications, but you must allow everyone else to do the same and you must clearly identify any modifications.
Be aware there is no warranty whatsoever for Chart. This is described in full in the license terms. No warranty whatsoever includes no warranty against any losses or any missed gains as a result of anything Chart does or doesn’t do or show.
Note that Chart is only a program for displaying data. The program and this manual do not give financial advice.
The data that Chart may download or display will be copyright to the creator of that data and will be provided under terms decided by the creator. You must check each data source used to see that you and your intended use are within the terms (see Data Sources). The minimum for a source in Chart is that personal non-commercial use is permitted. Usually no re-distribution is permitted.
The author believes that the manipulations Chart performs on downloaded data are purely mechanical and do not cause the program’s terms to be added to any results. Derived forms like the database files, watchlist quotes, screenshots of graphs, etc, will be subject only to the conditions of the data originators (cumulatively if data from more than one source is shown).
Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2014, 2015, 2016, 2017 Kevin Ryde
Chart is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version.