The Dac price is fixed on the Dacxi Exchange pending the listing onto external exchanges. This does not stop someone placing an order at a price that is different although the system will not execute the order.
This may result in the price ticker/calculator picking up the price that the order has been placed at. A subsequent trade will then adjust the ticker again. Your crypto value may be affected by this in the short term.
Rest assured this does not mean a trade has occurred at a different price.
You can see the current Dac Price on your Exchange Portfolio page, which is the first page shown to you after log in.
If you'd like to change the displayed currency, see how-to here: How do I change my display currency?