after they decided to short it... they often will call up direct lines to some senior management at a bank to see to it that their trade would do fine...
if managers tell them it is possible to see the level they want.. then the trade happens...
but no charts were needed on the client's side....
Tech traders are very often traders who cannot bear Drawdowns while... big boy/fundie traders... they dont mind drawdowns... like 500 pip or 1000 pip drawdown... simply these guys may have connection to the FED perhaps...
so if a position is starting to threaten a bit too much... see how the FED board of director forced Ben to promote QE3 to save their asses on their Treasury bond investments...
We live in a finite world with infinite possibilities.