Hi ! :) I have a little problem regarding helpers functions. I would like to do maths on properties inside helpers functions but I don't know if it is possible. {{#rollBetween() Roll cible+1 reussite_part+79}} <td COLSPAN="3">Echec !</td> {{/rollBetween() Roll cible+1 reussite_part+79}} Here is a piece of code of a roll template using helpers functions. cible and reussite_part are properties previously defined in the roll template. These properties take values upon clicking on the roll button. Nothing new. However, I need to be able to do calculation on these properties so that I can use them again in the helpers functions. Is it possible ? What is the syntax if yes ? Regards :)