I did it twice already and made a decent profit back, 4200 was the top it can see and I realized it at third time price went down after reaching 4200, so I said next time I see 4200 I will sell, also when the price hits 3600 its harder to go back down and usually goes higher so I said I will buy next time it hits 3600. So last time it hit 4200 I sold all my coins and I rebought it at around 3740 (couldn't wait until 3600 ) and now I am in profit, that was without bitcoin going up, with this new 4000+ I am in even bigger profit. Never looked at any charts neither, was just too obvious.
It works until it doesn't
You make profits from a few trades, then you expect more to come (as you say yourself) and end up losing badly. If things start to repeat themselves (like in your example), think repeatedly, maybe you are in for a big trouble? In this case, you implicitly start believing that the same cycle will be repeated again and again (this is natural as this is how human mind works) but nothing can be further from truth as the only thing you can be certain of is that the market always fools the majority of traders in the long run