Global constants - GoCharting

Language version: 2 · Reference version: 2.7 · Date: 2026-10-25 · Compiler build: df7b3b14 · Namespace: global · Entries: 3

`false` (constant)

Definition The bool value false. Comparisons and conditions produce it; it can also be written directly, as a default value or a constant. Type const bool Example

//@lipi=2
indicator("false Example", overlay=true)
static bool crossedUp = false
if talib.crossover(close, talib.sma(close, 20)) {
    crossedUp := true
}
bgcolor(crossedUp ? color.new(color.green, 0.1) : na)

`na` (constant)

Definition Stands for a missing value. A series is na where there is no data yet, for example close[1] on the first bar, and a plot or colour that is na is simply not drawn. Test for it with na(x), never with x == na, and replace it with nz(x, alternative). Type const na Example

//@lipi=2
indicator("na Example", overlay=true)
// Plot only on up bars: na values leave gaps
plot(close > open ? close : na, title="Up Closes", color=color.green, style=plotStyle.linebr)
// na(close[1]) is true on the first bar only
bgcolor(na(close[1]) ? color.new(color.blue, 0.3) : na)

`true` (constant)

Definition The bool value true. Comparisons and conditions produce it; it can also be written directly, as a default value or a constant. Type const bool Example

//@lipi=2
indicator("true Example", overlay=true)
showMA = true
plot(showMA ? talib.sma(close, 20) : na, title="SMA", color=color.blue)