This pink support line in BITSTAMP:BTCUSD has been tested a few times over the last few months and has almost always held, except for the dip in mid-January. It also forms the bottom edge of the trident that stretches back into last year.
It was broken again today for what looks like a retest of last week’s lows. Doesn’t feel like panic yet, so this one may go deeper.
Also coming up are the Futures contracts on 26th January (the January 17th ones closed at $10,900, down from $17,000, which has raised some concerns). to the futures being made available versus their closing date may become quite clear this week.