...
PS > $items = Get-JobSchedulerOrderHistory -JobChain /testsos/globalsdailyplan/jobChain1CreateDailyPlan
Returns today's order execution history for a given job chain.
...
PS > $items = Get-JobSchedulerOrderHistory -Directory /test sos -Recursive -Succesful Successful -Failed
Returns today's order execution history for any completed orders from the "/testsos" directory and any sub-folders recursively.