The Dow is making new all time highs. After doing the same, the transportations retreated.
Now watch to see if the transportations bounce back from the recent sell off to reach new all time high themselves. If they do not, it is a sign to start looking for ways to short the market in a timely way.
In my case, it will mean take profits and/or shore up cash majorly in anticipation of a sigificant, impending correction.
However, if the transportations make new all time highs again, then it's bul market business as usual.
