You can describe the strategies and the ideas in your own words but don't attach/redistribute copyrighted files such as commercial expert advisors and indicators. If possible, you should recreate them from scratch. This is like you learn a street magic from a video. It's totally legal to share the secrets, but it's totally illegal to share the video in PUBLIC to the mass.
Ok, here's how it works: if somebody claims his or her copyrighted creation is posted in this forum, I will have to remove after verification. I can't keep it because of copyright laws and web hosting agreement.