The blue is the only one where we have both open and close information. It seems to me that manipulation is obvious but I can't say that for sure. The open date for the first contract (starts December '17 ends June '18) opens one day before the all time high. The close date for the contract is one day after the local low, the lowest low Bitcoin has seen since $20K. Was this timed perfectly? Looks like it to me.
Assuming this is right and the market is being manipulated, we could be seeing a real uptrend in the coming months that would match the start dates for the other future contracts. I wouldn't trade on this information, I'm still holding my coins as I'm holding medium-long term .
Open interest in is rising and price is rising which suggests a move. Needs more to confirm the sentiment though.