What are premium and discount in ICT?
Take the current dealing range — from a clear swing low to a clear swing high. Its midpoint is equilibrium. The upper half is premium, the lower half is discount. In an uptrend, ICT traders want to buy only in discount, after price has pulled back below the middle.
It is a filter, not a signal: an order block or fair value gap in discount is a better long than the same zone in premium. The same logic flips for shorts in a downtrend.