Rude
Do I use this in a technical sense.............no, I do not use technicals at all.
Does an overbought / sold measurement indicate an "inefficient" price.
This really depends on how you are measuring the market, viz. how is the indicator that you are using measure.
2 examples;
Bollinger Bands utilise standard deviations, a statistical construct ( mathematical ), therefore yes, it is trying to measure "inefficiency" in a mathematical context & construct.
TRIN....which measures the # of advancing issues against the # of declining issues, is an interesting one, as logically you should not infer a measurement of "inefficiency" to this measurement.
However, that is almost exactly how it is used.
Now the difference, is in their application.................in THEORY, Bollinger Bands as a statistical measurement should not require a stoploss.
Where, TRIN, as a purely arithematical construct would require a stoploss. However, what you would find is that if TRIN was highly negative, then the fall ( or oversold trigger ) would most likely be picked up by a bollinger band as a STATISTICALLY significant change, and thus not require a stoploss.
As you can see, your question is not easily answered, and there will be many different interpretations, and on any given day could be valid.
Which is why at the end of the day, the shorter the timeframe you trade, the less any outside modelling will help, the more you have to fly by the seat of your pants, and intuition becomes vitally important, as interpretation of charts, indicators, volume, whatever becomes extremely fluid, and open to manipulation.
The longer the timeframe, the more accurate modelling becomes, as the accuracy required is less.
cheers d998