Declare the variable in a scope that includes every place where you use it. In this example, `candleRange` is created inside an `if` block, so the global `plot()` call cannot see it. Declare the variable globally, then use `:=` inside the block to update it. This preserves the conditional calculation while making the identifier available to `plot()`.
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Before and after
Both artifacts include the version declaration and the code needed to inspect the stated problem. The diff lists the lines that change between them.
//@version=6
indicator("Undeclared identifier demo")
if close > open
float candleRange = high - low
plot(candleRange)//@version=6
indicator("Undeclared identifier demo")
float candleRange = na
if close > open
candleRange := high - low
plot(candleRange)--- broken.pine
+++ fixed.pine
@@
+float candleRange = na
if close > open
- float candleRange = high - low
+ candleRange := high - lowLonger Pineify guide
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Compilation error
Compilation error
Compilation error
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