Documentation/AlgoCode/Function reference
na
Not available — no number on this bar.
Reference/Math & comparisons/Language
na
na means the indicator does not have enough bars yet. ema(50) is na on the first 49 bars. Comparisons with na are false. Fill gaps with replaceMissing(value, fallback) (shorthand: nz).
Return value
na
Example
fast = ema(50) filled = replaceMissing(fast, close) plot filled as "EMA 50"