Which commodity or currency pairs can I trade using trend as an indicator. I mean were ever it face either buy or sell it face that direction for a good period of time or days
I am assuming what you are saying is which indicator to use for predicting a trend. All the technical indicators are supposed to do that.
To add to @lorenzobates’ answer, here are some indicators you can try + a link to the babypips lesson: MA, ADX, and BB. 
I am assuming what you are saying is which indicator to use for predicting a trend. All the technical indicators are supposed to do that.
Yes you are very correct