Get specific item in app connect array

I have an array:

<dmx-array id="arrConfirmStep" dmx-bind:items="content.serverconnectLowestBudgetConfirm.data.queryLowestBudget[0].Details.values('budgetFieldID')"></dmx-array>

It outputs data using {{arrConfirmStep.items}} and return for instance 1,5,6

How can I return index 0, 1,2 etc from the array and only return the 1, the 5 or the 6?