When trading double leverage ETFs (like for the SPY, IWM, QQQ, etc), we recommend:
(1) trading double leverage on long signals and single leverage on short signals, or
(2) simpy trading double leverage long only.
Here is how MIPS3/MF performed trading double leverage SPY (SSO) long only over the last 12 months.
SPY +23.4% SSO Long Only +50.5%