Would be really handy if the Alerts page had the ability to create custom alerts for low supply. Basic concept I have is that you would click the button to add an alert, select an item signal, and then specify an alert threshold. If the total supply of that item across all supplying stations dropped below the specified amount (and/or perhaps be able to tie it to specific stations, though that might complicate the feature), it would fire an alert notifying you of low supply before you actually run out.

In theory you could do such a thing by tying every LTN station together in a circuit network, but that would involve running a fair amount of wire (or using one of the wireless circuit mods) and putting down a combinator and/or speaker for every single item you want to monitor. Having it in a single integrated location that piggybacks off this mod's already excellent LTN tracking capabilities and benefits would be exceptionally handy.