Exclude negative wh/mi values from monthly averages

If data signal is lost on a return journey (e.g. when parking underground) then TeslaFi treats the entire journey as a single journey. If a charge has occurred in underground carpark TelsaFi shows this as a big negative efficiency-900 to -1000 wh/mi which then screws all average wh/mi figures that include these figures.

I don't want to have to delete these drive records so I would like the option to 'Exclude Negative readings' from Average calculations. The same option could be applied to any reading that might go negative, not just Wh/mi.

Many thanks for this great Tesla Tool!