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Thank's, I need to learn how to read this chart because I don't have a clue about

I agree but, when we are withdrawing small amounts like $10-$15 which I do quite often that time converting is very helpful especially when the withdrawal fees are shot up toward .0005 BTC lol.
I usually wait to have at least 20 dollars to withdraw
But right now it's almost normal, fees are 0.00003012 BTC, pretty much acceptable
I'll try to use Lighning Network for my next withdraws