Markets are always either trending or non trending or consolidating.
When a market trends, in case of an uptrend the price action climbs higher and higher then the market most of the time will take a pause and try to consolidate the gains made.
If the gains are sustainable, the market will start trending again after the pause.
However, if the gains are unsustainable, the market will suddenly reverse itself and lose all the gains in a very short time.
If you push a large rock downhill, the speed with which the rock will fall downhill will be much much faster than the speed with which you can push that rock uphill.
The same analogy applies in a bull market when it uptrends too fast too far or is in what you call an overbought condition.
Now, markets trend then they consolidate the gains and then start trending again.
So always look for these types of market conditions in which the price action climbs too fast too far.
These types of market conditions are ideal for going short.
However, if you are in a long position and watch the price action climbing too fast too far, exit before the rock starts to fall very fast.
Using volume analysis in conjunction with indicator is a powerful tool to help you determine if the price action in the market is going to continue its uptrend.
Now, if you find that the price is climbing higher and higher while the volume levels are declining, this is a direct clue that is telling you that the price advance is unsustainable.
The price will soon start falling like a dead stone.