Hi Myimp. HTZ has been in a nice uptrend since Sep.-Oct. 2011, that is, a series of higher highs and higher lows which took the stock from about 8 to it's current 15.04.
A pullback wouldn't surprise but a close under the prior pullback, [twice] at 13.50 or so would cause some concern.
I don't know your trading style so I'm hesitant to suggest anything, though I've found it prudent to sell a "bit" into strength, especially after a nice run.