Perhaps trying AIM'ing two 3x ETF's that have low/inverse correlations aimdeveloper http://chart.finance.yahoo.com/z?s=TMF&t=2y&q=l&l=on&z=m&c=BGU&a=v&p=s&lang=en-GB®ion=GB That way as one is buying, the other might be selling and visa versa - and might be less prone to exhausting cash reserves.