I was just looking for your post a few months back, when you ran an experiment playing both sides of an ETF simultaneously (I think LABU/LABD , UWTI/DWTI and UGAZ/DGAZ)
that was cool. can't find that post, but I believe that system works only if the underlying sector/commodity stays relatively stable? (ie., oil doesn't surge 15% or something)
basically making money from the disparity in decay/erosion between the two opposing ETFs I guess.
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