I note that the date specific alternate format (noted in title) allows  calls to specific calendar dates.  Besides the Close this format supports Open/High and Low for the date.

1.)  Is this formatting capable of use with other cases, such as Volume - and perhaps in conjuncdtion with even some other indicators (for example RSI)?

2.)  If the data specific format uses a weekend date, what happens?

Thanks

You can use it with O, H, L, C and V, but make sure you put the date in single quotes like C'09/16/16'

If the specified data falls on a weekend (or maket holiday) it returns the next available value. If you put in a date that falls on a Sunday, it would return Monday's value.