Often the BTC/USD follow a 24 days cycle (12 days up movement  followed by 12 days down movement), during the strong rise of april-june instead it followed a 12 days full cycle (6 up, 6 down). I dunno why, perhaps it’s tied to the ~12 days period of bitcoin difficulty adjustment. So far is working very well and as you can see in the left chart now a reverse of the cycle is due.

The fact that cycles exist does not imply that they exist all the time. Cycles come and goand external events sometimes dominate and obscure existing cycles. Experience shows that cycles useful for trading are present only about 15 to 30 percent of the time. This corresponds remarkably with J.M. Hurst’s statement that “23% of all price motion is oscillatory in nature and semi-predictable.” It is analogous to the problem of the trend follower who finds that the markets “trend” only a small percentage of the time.

I strongly recommend J.M Hurst book “The Profit Magic of transaction Timing”