Solar Tracking Margin As A Percentage

Would it be possible to have the solar tracking margin as a percentage instead of an absolute figure? This would effectively allow folks with two systems on the same roof to account for both systems. E.g. if you have one 5kw system and one 3kw system on the same side of the roof, you could run ChargeHQ on the 5kw system with +60% offset and it would effectively account for both systems. However, running a +3kw offset wouldn’t have the same effect.