Astrological Indicators for Sleep Issues
I can provide my details for research on insomnia, but I would probably prefer not to show my card here too openly.
Maybe we also should consider, that planets may behave differently in a chart of someone who was born during night-time vs. someone who was born during day-time, depending on their position below or above the horizon of the native. or if they are west or east from the sun in the birth chart (aka "morning" or "evening" star regarding venus, but this may hold true for other planets as well)
Somewhere I´ve learnt - wasn´t that Ernst´s teaching? - that an overactive Mercury may cause sleep problems; a Mercury that doesn´t go to rest.