RSI is a momentum indicator, however most people seem to be using it to go against the momentum by trying to identify tops/bottoms using it. Its in my opinion the wrong way to be using it. It can be easily used for trend following which seems like a better use for it.
Uptrend - RSI > 60 Downtrend - RSI < 40 Sideways - RSI between 40 and 60
If however not interested in filtering for sideways trends and convert it to a long-short only strategy that stays in market all the time then it can be simply modified by setting both overbought/oversold thresholds to 50. In such a case uptrend will be above 50 and downtrend will be less than 50.
Note: wait for close for current bar to be confirmed as RSI is calculated at close