Today's action confirms start of massive downtrend
Move was on extremely light volume. The greedy, small, perpetually novice retail investors, who enter late and never know when to exit, are now in the mix. Those who understand the industry and Intuitive's risks are going to leave these investors with severe losses (as usual). I would imagine that this unfortunate class of investors includes many on this message board. Still time to get out (like I have)... but you won't. You never do.
The fact that it was extremely light volume abrogates your hyothesis. Heavy down volume may mean something, but in a day before our President gives his vision for the future, including healthcare, expect most investors to be sitting on their hands.
There are MANY holes in your theory. The fact that ISRG is and always has been primarily owned by large, savvy institutional investors rather than "greedy, small, perpetually novice retail investors", is just ONE. ISRG's investors and management are patient and focused on the long term, not like you, the impatient, greedy, small minded and perpetually dishonest novice retail short