How to set up this skill calculator

[ULTIMATE-SEVEN]

Hi all,
need some help to config the earthquake cd (35 second) with this specific setting Barbarian - Game Guide - Diablo III
I'm using tha last rev of DB and trinity. have found some setting in BarbarianCombat.cs file, but idk how to set it up.
Anyone can help me?
public static bool CanCastEarthquake
{
get
{
return
!UseOOCBuff &&
!IsCurrentlyAvoiding &&
!Player.IsIncapacitated &&
CanCast(SNOPower.Barbarian_Earthquake) &&
!GetHasBuff(SNOPower.Barbarian_Earthquake) &&
TargetUtil.IsEliteTargetInRange(6f) &&
Player.PrimaryResource > 50;
}
}

Regards