Optimize if then else in expression

[#1]

Hello,

i have to optimize one expression on chart :

if(sum({<Year={$(vCurrentYear)},Month={$(vCurrentMonth)},[Top]={"O"}>}[OD-Stock value]) <= sum({<Year={$(vYearBefore_MonthAfter)},Month={$(vMonthAfter)},[Top]={"O"}>}[OD-Sales]),
   sum({<Year={$(vCurrentYear)},Month={$(vCurrentMonth)},[Top]={"O"}>}[OD-Stock value])*30/sum({<Year={$(vYearBefore_MonthAfter)},Month={$(vMonthAfter)},[Top]={"O"}>}[OD-Sales]),
if(sum({<Year={$(vCurrentYear)},Month={$(vCurrentMonth)},[Top]={"O"}>}[OD-Stock value]) <= sum({<Year={$(vYearBefore_MonthAfter)},Month={$(vMonthAfter)},[Top]={"O"}>}[OD-Sales])
  +sum({<Year={$(vYearBefore_Month+2)},Month={$(vMois+2)},[Top]={"O"}>}[OD-Sales]),
((sum({<Year={$(vCurrentYear)},Month={$(vCurrentMonth)},[Top]={"O"}>}[OD-Stock value])-sum({<Year={$(vYearBefore_MonthAfter)},Month={$(vMonthAfter)},[Top]={"O"}>}[OD-Sales]))*30
 /sum({<Year={$(vYearBefore_Month+2)},Month={$(vMois+2)},[Top]={"O"}>}[OD-Sales]))+30
 ))

I can't do this test on the script, because the value depend of selection in application.

The variables vCurrentYear, ... are calculated with the current selection.

Thanks for your suggestions.

Sophie