bought ARMH pre-mkt last Friday @ 29.19 after the little better than expected job report, stock dropped in the morning and edged up to 29.22?

Monday, Oil price kept surging, ARMH was up pre-market, so I sold it around 29.47. Then the mkt dropped. Tuesday morining, news showed some relief in oil price (OPEC may meet for increase output) got in during pre- at 28.35, out around 3:45 at 3.65, mkt closed at 3.55.

Wednesday was a down day, OPEC said didn't need to increase output, Lybia is still in battle. Thursday, EU debt, Spain got downgrade, mkt drop, ARMH dropped 8% at most... STLD drop 3% and mid day already retreat to -.45% (why so good?)