Improve macro to add crit damage?

So i use this macro to easily click attack and compare it to the npc_ac from targetted token (only works for tokens with filled sheet though). I found out that when it rolls a nat 20, the damage is not crit. Maybe if anyone can improve it to detect nat 20, that would be great. Damage: [[{{1d20cs>20  + 6}>@{target|npc_AC}} * {1d4 + 4} ]] piercing, and DC11 CON save or half [[3d6]] poison

You need to use a trick to grab the d20 roll, since you lose it once you use the > comparison operator: Damage: [[ [[{[[1d20+6]],0}k1>@{target|npc_ac}]]*{1d4+4}  ]] piercing, and DC11 CON save or half [[3d6]] poison, attack roll $[[0]] Then you just have to check for the crit in the box at the end - default is crit on 20 only. Or you could do this: &{template:default} [[ {ceil([[[[1+{[[1d20+6]],0}k1>26f<@{target|npc_ac}]]d4]]/100)*4,4}kl1 ]] {{name=Weapon Attack}} {{Roll=$[[0]]}} {{Damage=$[[2]] + $[[3]] piercing}} {{DC11 CON save=[[3d6]] poison}} this will roll 2d4+4 on a crit, 1d4+4 on a hit, and 0d4 + 0 on a miss.