The RSI is a quality indicator for trend. I believe this and i am going to explain another profitable way of combining it with the Bollinger Band for good result.
INDICATORS: Relative Strength Index, Bollinger Band (all default Settings)
TIME FRAME: 4HR AND 30MIN (You could also use 30min and 5min)
Its very simple; apply the bollinger band to all time frames but its needed in 30min timeframe. In the 4hr apply the RSI. When RSI is above 50, its uptrend and below 50 is down trend. Then move to 30min for entries.
Forex System - RSI trend - Bollinger dips and rallies