It's my understanding that the RSI_BUY_LEVEL acts as a second trigger to buy. I don't know much about DOUBLE_UP since I don't get too many bags that I don't mind hodl.
When I first started testing GB 6.x.x, I used BB and RSI alot to BUY when coin oversold (~25 - 30) and SELL when overbought (70+). Very easy, but can be very slow. Can take a while to make a single trade. BBRSISTEPGAIN and BBSTEPGAIN both work much better for me.
For example: BBRSISTEPGAIN
If
LOW_BB: 1 # BUY trigger1
RSI_BUY_LEVEL: 35 # BUY trigger2
SELLLVL: 1 # This setting allows user to select which SELLLVL percentage GB should try to sell at first (2%, 4%, 70%)
SELLLVL1: 2
SELLLVL2: 4
SELLLVL3: 70
Then GB will only buy when candle reaches 1 (or lower) on bottom Bollinger Band and the RSI value is 35 (or lower).
SELL order is placed when the trend analyzer sees upward coin price approaching the first chosen SELLLVL percentage.
In example above, it will try to sell at 2% first, but try to sell at higher SELLLVL if the trend is still upward.
I like to use this strat when I see a large value coin that swings alot between overbought and oversold.
BBSTEPGAIN does the same thing, but no RSI trigger. Any RSI setting is ignored.
GB would BUY at candle 1 on bottom Bollinger Band and sell according to STEPGAIN settings. I use this one on most everything else.
Hope this helps,
Nix