Limited Price Bands - Sage 200

When we set up a promotion in sage 200 we use the limited price band feature, which is set up for the relevant customer accounts, set the timeframe for it to be active and add the products. However this doesn't show as an additional discount for the trade account customer on the website. It just shows the updated price and the RRP. I would like a way for it to show it as being marked down from the customers price band.