Hope I'm not stuffing up anyones specialty but for several years around this time I have followed a niche opportunity called buying certain oilers that get sold down in late May to mid June as they get ditched for tax reasons.
Usually returns an average of around 20% for a four week hold.
Some oilers are particularly reliable for this from a charting point of view.
A couple to get you started are LKO, and PCL.
I will add the rest later as I'm heading out the door now.