I've created a PDI which basically shows weekly spend on energy at numerous buildings on one of my companies sites. Using performance equations I've created a coloumn which displays the difference in spend between the previous week and the week previous to that (hope that makes sense). What I'd like to do is add to the display an arrow which displays if the weekly spend has increased or decreased (green arrow up for decrease in spend, red arrow down for increase in spend).
I can obviously add the arrow but I'm unsure how to develop the method of how the arrow changes when spend increases / decreases. I'm a bit of a newbie so apologies if this a bit vague. I've read through the process book manual but struggling to find anything which points towards this.
Many Thanks in advance