Have you tried and verified this is a profitable strategy? I heard longer term investment of leveraged ETF/ETN is a losing strategy..... (less profit, bigger loss)
Indeed, each one separately, but not quit when in spread.. in any case, as always you should backtest anything you think you might like to Implement...
past few days, the day range has been very good. average day range is around 180 ticks. the weather must be very comfortable.