This is what use on the XT for 5 days in a row, has made 8% in 6 days ... I would say, respectable enough.
"bbstepgain": {
"NAME": "bbstepgain",
"TRADING_LIMIT": whatever coins you're prepared to trade,
"PERIOD": 15,
"BUY_LEVEL": 0.1,
"GAIN": 0.85,
"EMA1": 16,
"EMA2": 8,
"HIGH_BB": 40,
"LOW_BB": 40,
"STDV": 2,
"SMAPERIOD": 150,
"SELLLVL1": 1.1,
"SELLLVL2": 2,
"SELLLVL3": 70,
"SELLLVL": 1,
"PANIC_SELL": false,
"DOUBLE_UP": false,
"DOUBLE_UP_CAP": 1,
"STOP_LIMIT": 60,
"BUY_ENABLED": true,
"MIN_VOLUME_TO_BUY": 0.0001,
"MIN_VOLUME_TO_SELL": 0.0001,
"TRADES_TIMEOUT": 0 DANGER, safety off!
I set SMAPERIOD a little higher, to 150 candles. This is in hope to get my SMAs less jerky. So far not a single bag, fingers crossed. I have the feeling there is a little less trade because of this setting, but at about 8% profit this week, the bot is in my dream range. Ah yes, some more wouldn't hurt, but I'm not touching this as long as the bot continues to deliver 5% or more per week consistently.