Requirement: To show movement (in terms of improvement, decline or no change) of fields in PPO in terms of their previous values.
Recommendation: Please consider implementing as a special type of field formatting which shows one of 3 graphics (up, down, sideways arrow) depending on the value of the field e.g. 0=Sideways, 1=Up and 2=Down (not sure what we do with NULL values).
The field can the be made a calculated number field, which provides the correct value based on what the field value was prior to update in comparison with what the field value is after update.