alt Hacker NewsTrading across borders seems to be a part of this story.
If your local price is high you can import, if it's low you can export.
If you're at the end of a grid and/or your transmission capacity is limited your price has the possibility to go higher or lower without that damping mechanism.
Electricitymaps has a pricing layer which seems to show central Europe moving in sync when I randomly check it:
https://app.electricitymaps.com/map/live/fifteen_minutes?sig...
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So energy in Spain is cheap because they produce a lot but can't sell a lot easily, and Austria/Central Europe is expensive because they sell their domestic energy too easily?
If this is what you meant, then it sounds like an argument against free trade, if it means you keep ending up with the short stick.
And the counter intuitive thing is that people in countries with lots of renewables and not so many external links (e.g. Scandinavia with hydro) might be against adding more links since it will increase electricity prices.