Weakness got a lot of meaning one.
Some weakness can snowball into big wok. 

Seriously, say if I am not in the stock, I 'guess' it's much better to just wait and see how the uptrend unfolds and then watch how the stock consolidate.
When you feel comfortable enough, like you see the general profit taking well absorbed and the stock holding firm, and you like what you see... then...

But seriously... there's no sure thing in trading.
What you expect the chart to do and what the stock actually does could be entirely different.