Candles give a different perspective than a line with just daily closing prices eh.
The 'yes it did' days in question did have intraday lows of 545 and 555 but closes of 567 and 610
So one way of looking at it 550 odd was actually support (as per your chart) but for those who only look at prices at the close 550 barely registers on the way down. There was that spike down at 567 and then a spike down to 540 a few weeks later.
When its 8 bucks again in a few months we'll wont enen worry about todays failure to break through a thing called resistance.