Hey Jie,
thanks for sharing your experience. Looks like you do really a great job testing the EAs.
For me, I have no doubt in Petko and his methods of teaching. I take every new course and put a lot of efforts to learn the maximum of it.
First, I was thinking to create my new EAs with my logic in trading, but then I decided to take the courses. I have the 99 EAs course from a few months now, and I still succeed to test them all, but how do you keep so many EAs on one computer? Have you installed 14 platforms on one laptop?
So far I test the EAs for the last 6 months, and from every month I take 6-7 fantastic EAs that I put on live. Results are nice so far, but I am always interested to improve them :)