Auto-Sell
Automatically sells any resources you don't need for purchasing techs and that aren't used in recipes. Sells once every 120 minutes. Upgradable to 5 minutes in -5 increments. Can be enabled or disabled at will.
Turn it on for the first time: it just sold all the items I needed to purchase techs (I had them all) all the refined metal I would need to remake them AND all the ore I would need to replace them... is this a joke or a bug?

I suspect it only looks at the next available techs, not the items for the entire tech tree.
But it should take the tech visibility into account imo...

skill issue