See the easy way to decide whether a certain point is strong or weak is to check the orderbook for the trades around that price. If you see bitcoin has a large support level at the 6000k USD mark and at 6100 - 6200 USD marks. This means that even if the market is bearish it will not drop easily before someone dumps huge amounts to break that wall. But things can get really messy at times since trading is highly speculative and idiots are full of nonsense BS in every social media.

I wont say its impossible but you can make calculated guesses at these points on how to place orders.