Which HUD package is this? I assume WSD is Won at Showdown, the formula of which you can check out here: https://hand2note.com/Help/pages/Cus...on-at-showdown
If you need to create a specific spot for the expression stat, you must use a plain stat with that spot specified in parenthesis. For example in WSD IP you must use "flop any action IP" in the formula. But first you'll have to create this stat yourself or use any other plain that fits your needs