Hi all. As we ID zone areas, which may be very obvious (like large bull or bear run), there will certainly be zones in between those areas that can arise (call it subzone or interzone). As the market moves in whatever direction, subzones get invalidated (or pass through). I wonder is there such a thing as an expiration on zones if they do not become invalidated? One could draw out a large zone that could be 2-3 weeks prior, are these zones still meaningful after such a long time?