Quick Start

Navi scripts run on the Longbridge platform via the longbridge CLI.

Install the Longbridge CLI

See the installation guide to get started. The longbridge quant command runs Navi and Pine Script files against historical data.

Write Your First Indicator

Create sma.nv:

indicator("SMA", overlay: true);

let len = input.int(14, "Length", minval: 1);
plot(ta.sma(close, len), "SMA", color: color.ORANGE);

Run Against Historical Data

longbridge quant run AAPL.US --start 2024-01-01 --end 2024-12-31 --script sma.nv

Or pipe the script directly:

cat sma.nv | longbridge quant run AAPL.US --start 2024-01-01 --end 2024-12-31

Output defaults to a table with bar-by-bar values. Use --format json for structured output.

Write a Strategy

strategy("MA Cross", overlay: true);

let fast = ta.ema(close, input.int(10, "Fast"));
let slow = ta.ema(close, input.int(20, "Slow"));

if ta.crossover(fast, slow) { strategy.entry("Long", Direction.Long); }
if ta.crossunder(fast, slow) { strategy.entry("Short", Direction.Short); }

plot(fast, "Fast EMA");
plot(slow, "Slow EMA");

longbridge quant run AAPL.US --start 2023-01-01 --end 2024-12-31 --script macross.nv

Running Pine Script Files

Use --dialect pine to run an existing Pine Script file without any code changes:

longbridge quant run AAPL.US --start 2024-01-01 --end 2024-12-31 --script my_indicator.pine --dialect pine

The --dialect parameter selects the script language:

Value	Language
navi	Navi (default for .nv files)
pine	Pine Script V6 (default for .pine files)

If your file uses the correct extension (.nv or .pine), the dialect is detected automatically and --dialect can be omitted.

Converting to Navi

For new scripts, Navi (.nv) offers full editor support. The following shows a Bollinger Bands indicator written in both languages:

// Pine Script
// @version=6
indicator("Bollinger Bands", overlay=true)

length = input.int(20, "Length")
mult   = input.float(2.0, "Multiplier")

[basis, upper, lower] = ta.bb(close, length, mult)

plot(basis, "Basis", color.blue)
plot(upper, "Upper", color.red)
plot(lower, "Lower", color.green)
fill(upper, lower, color.new(color.blue, 90))

// Navi
indicator("Bollinger Bands", overlay: true);

let length = input.int(20, "Length");
let mult   = input.float(2.0, "Multiplier");

let (basis, upper, lower) = ta.bb(close, length, mult);

plot(basis, "Basis", color.BLUE);
plot(upper, "Upper", color.RED);
plot(lower, "Lower", color.GREEN);
fill(upper, lower, color.new(color.BLUE, 90));

Next Steps

• Language Basics
• Standard Library