Crypto trading is getting more and more technical as the days goy, and the formula that worked back then in 2018 is no longer accurate at this moment 2021 came with a lot of upgrades with many exchanges coming up with new features on the exchange.
I agree that crypto exchanges are making lots of improvements to provide latest and advanced trading tools to its customers to facilitate and to make sure convenient and pleasant experiences (still being profitable is up to trader's skills). This leads more complex market conditions still basics of our technical analysis are same (but might require minor enhancements), so you may try in demo account with same strategies to figure out what/where you need to fix
what are the most updated guide for newbies that have been out of trading for some time now.
There are few trading strategies which are based on multiple old strategies hence in my opinion, we do not need them as we could ourselves combine multiple strategies to have accurate signals.