On yesterdays earnings announcement price gapped up on DLTR (with higher volume). This offers a good near-term opportunity to buy this stock for a quick profit. Ideally, it would've been nice to have seen a more bullish bar.
For longer-term opportunities this stock has trended well in the past, but since June 2012 the trend has not been able to re-established itself. In late October 2014 the most recent upward wave began and, after breaking the October 2013 pivot high at around $60, it has shown more strength.
With two gaps up on higher volume and a retest of the October 2013 pivot this could well turn into a good longer-term opportunity, again.