I think its a little more useful to zoom out a little more and look at the whole picture. Bitcoin obviously had an insane bull run in 2017, but it topped at $19,900ish The trend has switched so you need to look at some other indicators to help identify market sentiment and identify predictable retracement levels. Right now $10k is holding fairly well with some candles wicking below it. There is still the potential for a trend reversal, but you should look for levels of consolidation, and look at historic levels of support and resistance. I hope this helps!