how to convert recursive variable to scalar to be used in variable subscript. New to thinkscript. Please help
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diffrence_bar_numbers should be scalar ?? in below
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def a = HighestAll(high);
def b = LowestAll(low);
def barnumber = BarNumber();
def c = if high == a then barnumber else Double.NaN;
def d = if low == b then barnumber else Double.NaN;
rec highnumber = CompoundValue(1, if IsNaN(c) then highnumber[1] else c, c);
def highnumberall = HighestAll(highnumber);
rec lownumber = CompoundValue(1, if IsNaN(d) then lownumber[1] else d, d);
def lownumberall = LowestAll(lownumber);

def diffrence_bar_numbers = highnumberall - lownumberall;

def shift_factor = 5;
def data = high;
def data_shifted = data[-5];

# ERROR is Only constants expected here: diffrence_bar_numbers CL variable indexer of data
def data_shifted_using_bar_numbers = data[-diffrence_bar_numbers];

piyushdna 

# ERROR is Only constants expected here: diffrence_bar_numbers CL variable indexer of data def data_shifted_using_bar_numbers = data[-diffrence_bar_numbers];

In thinkscript, you cannot have a dynamic value as the index. As the error says, it must be a constant (integer), which may also be an input value.

Getting some ideas working in thinkscript can require some awkward brute force coding as opposed to elegance...
For instance, if you happened to know that the bar number difference was always constrained to a some useful small range(s), maybe you could use several conditional expressions to finagle the result you're after.