On the Forex requirement/allocation of the last full pricing there is a check box box for fixed rate ticked on. When this box is ticked, Agiblocks will not take the average of the previous rate but use the rate shown.
In order to have the check box un-ticked, you must first un-allocate the Forex contracts from the requirement. Do this by putting the Risk tab in edit mode and edit the last Forex requirement. These screen shots that show the difference in the exchange rate between having it with and without the fixed option ticked on.
Rate check box ticked:
Rate tick box off:
