While it seems tough to determine world-wide supply-demand, there are a handful of traders I follow that seem to be able to choose entry and exit points with amazing accuracy. As a hodl-er, I try to ignore these types of trading strategies, but recently I've been toying with a strategy that involves tracking posts like this, WolfOfPoloniex, and other traders with good track records. When the majority say sell, the market usually dips or dips further. When the majority say buy, the market seems to rise. I'm adding me-tarzan to my list of traders to watch and collect data on.