To be honest, there is a lot of fake news as well what has been made just to drive the price into one or other direction, so you can use only very reliable sources like Bloomberg if you want to, but I will suggest better follow technical analytic data.
The data available of course is the only reliable stuff to rely on for it put aside all the fake news and opinions by those who want to disturb the market. Besides Bloomberg, there are few other sources as well that gives you the exact figures. Ultimately everything boils down to the term of trade as well. Despite every formula that can lead you in the right direction to make money, invest long term and forget about it. A period of five years it enough to make you a millionaire.
I think the "trend trading" is a viable trading option and people have been doing it lately in the past 3-4 months now, it wasn't that big previously. Now that bitcoin is not moving hugely and the swings are not as big as 20k times the trend trading is actually viable and thats why people found it popular these days.
If you see bitcoin going from 6.2k to 6.7k you kinda know it is going to 7.2k as well or when you see it going from 7.2k to 6.9k you also can see it going to 6.6k as well. These trend trading moves are actually making sense to me as long as the swings are low, as soon as another bull comes it would not make any sense once again.