@Earthian The use of extended hours is subjective... Some trading instruments suffer skewed indicator readings due to reduced trade volume outside the regular trading day while others are not nearly as effected or may even benefit from the extended hours - internationally traded instruments such as Forex being one of those exceptions... If you review different symbols to see how they move or gap in EH's you should be able to determine which market sectors are most effected... My evening and morning reviews are done with EH's on and then I trade with EH's off, but that's just my preference... That method allows me to help determine whether there was a market-wide shift or whether it was symbol-specific... Hope this helps clarify...