Youtube is full of trading techniques for BTC and alts, many of them seem well researched but I don't know if they actually make good money from it. I read advice that ranges from using just technical analysis to advice that says the best traders only use price action and volume as all technical analysis is just past trends.
No two traders are the same. I would say that you should research several methods and build a well-rounded system that isn't overly reliant on one school of thought. A few recommendations:
1) Tim West's time-at-mode analysis. This is a very practical approach to trading consolidations and breakouts with tools for proper risk vs. reward entries and targets.
2) John Bollinger's "Bollinger Band" analysis. Follow him on Twitter. He drops hints there about trading setups he uses, and there are lots of good tutorials out there on how to use BBs.
3) I also recommend learning about cycle analysis like Wyckoff and Elliot Wave. But I would caution not to become overly reliant on these. They are good for providing a "bird's eye view" of markets. Not so good for short-term analysis.