Perhaps others might agree, but if you been profitably for ten years plus, most sold systems, or TA or charting, you have knowledge to adapt almost anything to be a profitable system. You just learn how to adapt and spot potential problems in a second, you understand what works and what doesn't, you don't ask ET what do they think about trading plan. How can I know if someone else's plan is good without knowing their system, and they won't give it up as it is some secret sauce. You just trade long enough, you have back tested so many ideas, and seems you never run out of ideas, very very few systems other than maybe complex mathematical produced, qualified traders have not tried. I really doubt those with much experience just stop studying. I never run out of ideas and 99% of my time is back testing.
The big thing for masses to learn right now is "order flow", going to see courses up the wazoo being sold, it like everything else gone through the years, market profile, TA, Fibs, Gann, etc... and overall won't matter for most, if enough people do it, guess what the sharks will do? How difficult do you think it be for the quants to send in orders into the Dome? people don't think they read all the courses as well, I suspect they do? And after few years trying with that, they still won't know the ins and outs of reading charts. I think scalping is the hardest of all trading cause any kind of volatility change matters and you have to quickly adapt.