1 - Draw the trendline
2 - look for areas of confluence around the circle at levels for example 0.618, 1.618, 2.618, 3.618 ...
3 - Make an assessment
This is the 4Hour chart for Ethereum and isn't as reliable as using a higher timeframe, say drawing the through the entire bear market on the weekly for Ethereum would be more effective. Regardless it still serves its purpose.
This is little data for the current bull run.
This trendline drawing can be applied to any (weekly preferable) chart and assessments can be made based on the position of the price, above or below a key Fib level E.g (0.618)
Hope this helps aspiring chartists