Yep it is, could let you into a secret re. a leading investment bank that actually recommends trading with it on those settings, too much of a shock for some of our regulars to realise/ accept that a huge IB would use indicators for trading...:
As for over bought/oversold with rsi yep typically those are the areas..but you may prefer to use them in a slighty wacky way..consider what price does when it reaches those areas on a 5 setting, on time frames of 2 hours above I used to have a bit of success just diving in taking 20 extra pips when price went over the oversold or overbought...sound crazy?
Gotta go, preparations for my Daughter's 18th party are mounting up