You can create two custom pollers, one for RowId 6 and one for RowId 7 and use GET to poll the Raw Values. You have to create also two Advanced Alerts with Trigger Condition:
Poller Name is equal to <custom poller name>
Numeric Value is less than <value>.
Or you can create one custom table poller to poll whole table and also one Advanced Alert:
Type Of Property to Monitor - Custom Node Table Poller
