I'm using Gunbot v3.3.2.  Here is a snippet of the config; I've bolded where I'm confused:
//  PRIMARY SETTINGS 
DEFAULT_MARKET_NAME:'poloniex', 
DEFAULT_CURRENCY_PAIR:'USDT_LTC',   //  single pair format for all markets ! 
BUYLVL1: 2, 
BUYLVL2: 5, 
BUYLVL3: 40, 
SELLLVL1: 2, 
SELLLVL2: 5, 
SELLLVL3: 70, 
BUY_STRATEGY: 'BB', // accepted values BB or STEPGAIN or GAIN or PINGPONG 
SELL_STRATEGY: 'BB', // accepted values BB or STEPGAIN or GAIN or PINGPONG 
LOW_BB: 25, 
HIGH_BB: 25, 
PINGPONG_BUY: 0.12345678, 
PINGPONG_SELL: 0.12345678, 
BUY_LEVEL: 3, // If GAIN buy strategy is used, buy at this percentual below lower ema value 
GAIN: 2.25, // If GAIN sell strategy is used, sell at this percentual above bought price 
BTC_TRADING_LIMIT: 100,// max amount of BTC balance to use for each pair 
SECURITY_MARGIN: 60, // sell all balance if currency decreases x% after you bought it