Indicatores:
Bollinger bands: 10 periods; standard deviations 1,5
Bollinger %B: 10 periods; standard deviations 1,5
Periodicity: daily chart (1D)
Strategy
Long:
When the Bollinger %b reaches below -20, buy.
No stop loss. Close trade after 4 days(time stop loss) or 15% profit.
Short:
When the Bollinger %b reaches above 120, sell.
Stop loss above the high of entry candle.
Close trade after 4 days or 15% profit.