Hello can i use parameters in the discription i have a Item Level parameter as ITEM_LEVEL to set the sell item level if its below can i use it in the discription so it will say the number i put in it?

This information is in the rules list, and if you click on the "matches" tab, it'll show the value it is using, but you have to exit the rule viewer and set the parameter in the rules list to refresh it.

If you mean the actual description string, that's trickier, but we show it in the rules list tab.

yes i mean in the discription of the rule you make
i have something like sells items below item level: 500
will be nice if i can make that sells items below item level: ITEM_LEVEL where the ITEM_LEVEL is the number i set for the parameter
so if i set it to 400 it will show 400
or 300 it shows 300

I'll look into parsing the description for exact-match parameters that are also in the rule and replacing the text with the parameter value. Probably a midnight feature possibility.