It depends on what you are looking for.
The most popular course is AI technical analysis and introduction to algorithm trading. This course is free in special bundles, but it can be purchased separately. Most courses are associated with plans, i.e. we do not sell them since we are not focused on sales.
The most affordable course is, How to invest, which is 100% free for members who purchased AI trading plan. Yes, 100% free, despite the fact that came with a 600% return on investment. Read the reviews.