Alert lines are representing the OS/OB territory and set to 80/20,sort of disguised stochastic,but in this case it uses just chart scales.As you can see 1:10 is quite possible.I agree with you,naked is good.
You are probably referring to the RSI indicator, I don't use it personally for short term trading, but it can be used profitably though, the reason I don't use any indicators short term is because I want to have as little stop as possible, as indicators lag it's often the case that you'd be in at a less favourable price level, horizontal levels is all that one needs to be in at a favourable place (IMHO).

