I'm finding that RSI is a very good long and short range indicator of over sold/bought conditions. Mid term is a little tricky. I'm using many different time frames now trying to see which works best on which stocks. I'm limiting my list to ones I've scalped because of being familiar with their patterns already.
I noticed when scalping that there were times when I missed longer term moves due to taking the short money.
The 70-20 thing should be looked at also. A lot of stocks will trade in a 60-40 pattern as their over sold over bought range. When they move to the 70/20 range they become a better trade.
I saw some people on TWTR using this to trade low priced stocks with great success. So I am trying it out on larger capped stock and their options. Over all I think you could trade less and make more.
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