Thank you AliThis should do it:
=IF(AND(A7>B7,C7>D7),"Sustain",IF(AND(A7>B7,C7<D7,C7>0),"Increase",IF(AND(A7<B7,C7>D7),"Limited",IF(AND(A7<B7,C7<D7,C7>0),"Minimum",""))))
That seems to return a different and incorrect result, I'm afraid.Even shorter =IF(C7=0,"",INDEX({"Sustain";"Increase";"Limited";"Minimum"},((A7<B7)+(C7<D7))+1))
=IF(C7=0,"",INDEX({"Sustain";"Increase";"Limited";"Minimum"},((A7<B7)+(C7<D7))+1))