My point is that now is the time to look at the possibility of having the correction. I do not know when GOOG will be in a year. Maybe it will make another 50% up. But not now, after such big volume surge to the price up-side. I will not be buying it.
Big volume surge means bigger than usual number of shares changed hands. Price goes up because there are bigger number of bullish traders who is willing to pay higher price. Big volume surge to the price up-side means that big number of bearish traders entered and started to satisfy demands of bullish traders. After such big volume there are not going to be as much bluish traders as before (they already bought and their demand is satisfied). As a rule after such volume we have shift in supply/demand balance with further reversal.
I'm not stating GOOG has to crash and I'm not asking you to get rid of your GOOG shares. I have my analysis and you have yours and my analysis tells me not to buy it now.