This is January's 2018 Cboe Futures Bitcoin contract.
One -of many- fingerprints of institutional investors taking positions is that they tend to defend support/resistances at psychological levels.
This was barely seen before at Bitcoin market because -up to Cboe's- there was not really any serious interest in taking a "bearish-short" position that would profit only if the BTC price falls.
Remember:
Rules changed; adapt!
Regards,
Trade safe!
Alberto Alvarado
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