For me at age 10 my children should understand the market and how it works, interpreting chats and deciding the next move of each coin from studying the price action of different coins. At age 13 the should start trading with a demo account and at age 15 they should have funded their first account. This would help them become financially independent, also help then limit future gambling prowess and also make them prepared for their careers
My oldest son is 10 years old and while his thinking (and math) is very good, he doesn't have the maturity for this.
Fake moves, FUD, all this can easily surprise ca kid at this age. So no, I think that at 10 years he cannot understand fully all the charts would show.
I can't tell for the 13-15 years steps, but imho you're rushing it. And a child needs to enjoy his childhood; he has plenty of time later to think on how he can earn more money.