When is it time to sell

[Tj Hines]

To my bigger pockets family. As I diving more deep into emerging markets looking for value add plays with multifamily apartment complexes Im learning a lot about how to spot an emerging market with specific key indicators which is very helpful of knowing when to buy. 

My question is are there any specific key indicators or signs I should be looking for when it's time to sell? 

This way I don't get caught as the market spirals downward. Any thoughts or advice is greatly appreciated.