if your SELLLVL: is set to 2 you will not see much selling with SELLLVL2: set to 5 ... try setting it lower, to 1, and keep the other settings or just slightly tweak.
"bbstepgain": {
            "NAME": "bbstepgain",
            "TRADING_LIMIT": whatever,
            "PERIOD": 15,
            "BUY_LEVEL": 0.1,
            "GAIN": 0.6,
            "EMA1": 16,
            "EMA2": 8,
            "HIGH_BB": 41,
            "LOW_BB": whatever you fancy, it aparently works if the bot is buying OK,
            "STDV": 2,
            "SMAPERIOD": 50,
            "SELLLVL1": 2,  I would consider also lowering this a bit, maybe 1.2 or 1.5 or even less, 0.8 would work to speed 
 things up
            "SELLLVL2": 5,
            "SELLLVL3": 70,
            "SELLLVL": 1, set this to 1 to start sell cycle earlier
           ...
this is and old strat, keep any other settings in the new strat stock