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I say that it is necessary to learn forex to know how to apply it here with altcoins, since the methods of analysis are very similar.

Oh no no no.. Volumes not work in forex. Forex dont have transactions history. Forex - is a bullshit.
Forex rules not work in cryptos. But yes, peoples can learn about candles some information.

Analysis techniques are what matters , the basics are what matters in the end

If you trader - yes. But not if you an investor.
Investors not look at techniques analysis.