How to Pick Support and Resistance Levels the Right Way

Picking support and resistance levels the right way comes down to one filter: keep the prices the market has genuinely reacted to, and delete the ones you drew because you wanted a trade. A level worth keeping has at least two clear turns, a sharp move away from it, and history recent enough that traders still remember it. The rest is decoration.
Which turns actually count?
A turn counts when price arrived, stopped, and left in a hurry. A slow drift that wanders through a price and keeps going is not a reaction - the chart was just passing by. Think of it like marks on a wall: you can see where something hit hard, and you can see where somebody leaned. On the Ethereum daily chart, the prices worth marking are the ones a candle shot away from, not the ones it crawled past.
Which timeframe wins?
The bigger one, always. A level the weekly chart turned at three times outranks anything on the fifteen-minute, so build your map on the weekly and daily and drop to smaller timeframes only to time an entry near a level you already have. When two timeframes disagree, the higher one is telling you what the market cares about and the lower one is telling you what it is doing this afternoon.
How do you throw a level away?
When price went through it cleanly, traded well beyond it, and came back without caring. That level is finished - delete it. Also delete any level you cannot justify in one sentence, and any level you drew after taking a position, because that one exists to make you feel better. Keeping the chart thin is most of the skill; a screen full of lines gives you a reason to buy anything.
A useful exercise: mark five levels on Solana this weekend, then check them a fortnight later and score them honestly. The ones that held or produced a sharp reaction belong in your method; the ones that did nothing show you what you are over-marking. Next: finding levels on a fresh chart and drawing them correctly.