Feng Shui Dice Macros

I know its late and my brain is all fuzzy but a friend asked me if I could make a macro for him for use with Feng Shui. I asked him to explain the dice mechanics. The player rolls two exploding six-sided dice. One die is negative the other positive. If the initial dice roll is box cars (12) then a critical success has occurred and the players rolls two exploding six-sided dice. One die is negative the other positive. This number is then added/subtracted from the relevant skill. ( ( 1d6! - 1d6! ) if 6, 6 ) then ( ( 1d6! - 1d6! ) + ?{Skill|0} ) I do believe that covers what is needed. I know the formula will not work, but its the representation of what needs to happen. This probably can only be handled by a simple macro. Just curious if it can be done without an API.

It cannot be done by a simple macro, it will need the API. Any kind of If, then statement is not built into the macro system.

I am familiar with the Feng Shui system, and you should be fine if you just use /r 1d6!-1d6!+?{skill|0} Box cars (two sixes) can only occur on the first roll (unless you get multiple exploding sixes on both dice, but after the first set, it doesn't matter. Even if you put the rolls inline, you can still hover over the final numbers to see what the individual rolls were. Also, boxcars don't always mean a critical success. It could mean a critical failure. If the final result is negative, then it's bad.