Support Board

// below block to do your processing ??? you want to execute if end of bar --> which is the first tick of the next bar

if (sc.Index > PriorTickBarNum)
{
// execute this block of code if this is 1st tick of new bar
PriorTickBarNum = sc.Index;
IsItNewBar = 1; // you may not need this variable
// Do what you want. process prior VAH/VAL, etc. Save them to some persistent variables other than Prior variables
// I use 2 sets of vars - one set holds the VAH variables during the bar to keep the most recent values
// Move PriorTemp vars to PriorVAH, PriorVAL, etc
// Do what ever else drawing, processing you want
// last thing is to move the VAH, etc to PriorTemp??? vars
}
else
// save the VAH, etc to temp prior variables to keep the most updated VAH, etc of the bar for each new tick
{
TempPriorVAH = VAH;
TempPriorVAL = VAL;
// you could either return here or continue on for other processing of this tick
}

im trying to get the value of the PREVIOUS VAH/VAL.

Use the Spreadsheet Formula study, with a formula like this in its Formula field:
=IF(ID1.SG3<>ID1.SG3[-1], ID1.SG3[-1], ID4.SG1[-1])
where ID1 is the VbP study, and ID4 is this Spreadsheet Formula study.

This formula finds the change of value, then makes the previous bar's VAH persistent.

Unfortunately its a syntax error

The formula I offered finds the change of value of the VAH, assuming it changes at the next vol profile.
If this assumption doesn't return the value you need to be made persistent, then the formula needs to be altered.
What you want to do is possible; it's just a matter of 'finding' the value you want to be persistent.
See attached pic for how it looks to me: the persistent value is the dashed cyan line.

now i cant figure it out lol

What is the ID# of your VbP study?