Scripting Reference

This page is the entry point for the reference section. Use it when you need the shape of the language before moving into method-by-method pages.

Script Header

script({
  type: 'strategy',
  priceStudy: true,
  initialCapital: 100000,
  orderSize: 50,
  orderType: 'poe',
  commission: 0.05,
  commissionType: 'per',
  slippage: 0,
  marketType: 'crypto',
  resolution: '15',
  tradeBelowCash: false,
});

Public Script Surface

Surface	What it is
script({...})	Script identity and platform settings
built-in series	open, high, low, close, volume, time
input.*	User-configurable inputs
series(...)	Historical wrapper for derived values
plot(...)	Chart output
strategy.*	Order and position helpers
ta.*	Indicator and signal library
math.*	Numeric helpers
symbols([...]) and symbol.*	Multi-symbol basket surface

Core Patterns

• close, open, high, low, volume, and time are series
• use .get(0) for the current bar and .get(1) for the previous bar
• wrap derived values with series(...) when you need crossover helpers
• keep all platform settings in a single script({...}) block
• use object-style strategy.entry({ ... }) and strategy.exit({ ... })

const fast = series(ta.ema(close, 10));
const slow = series(ta.ema(close, 20));

Multi-Symbol Surface

symbols([
  'BTCUSDT:BINANCE:FUTURE:DEFAULT',
  'ETHUSDT:BINANCE:FUTURE:DEFAULT',
]);

const btcClose = symbol.close[0].get(0);
const ethFast = ta.ema(symbol.close[1], 8);

Strategy Defaults

strategy.default_qty_value;
strategy.default_qty_type;
strategy.initial_capital;

Use these when a script needs to read the configured header defaults. If an entry omits qty, the engine uses orderSize and orderType. If an entry provides qty, that explicit value overrides the header default.

Where To Go Next

• Platform Settings for the script({...}) header
• Built-In Methods Reference for globals, inputs, plotting, and math helpers
• Strategy API for strategy.*
• TA Library Reference for ta.*
• Multi-Symbol Strategies for public basket usage

Complete Example

script({ type: 'strategy', priceStudy: true, orderSize: 1 });

const fastLen = input.integer('Fast', 10);
const slowLen = input.integer('Slow', 20);

const fast = series(ta.ema(close, fastLen));
const slow = series(ta.ema(close, slowLen));

if (ta.crossover(fast, slow) && strategy.param_by_id('ema', 'position') === 0) {
  strategy.entry({ id: 'ema', type: 'long' });
}

if (ta.crossunder(fast, slow) && strategy.param_by_id('ema', 'position') !== 0) {
  strategy.exit({ id: 'ema' });
}

plot(ta.ema(close, fastLen), { type: 'line', color: '#D65A31' });
plot(ta.ema(close, slowLen), { type: 'line', color: '#1D4E89' });