Migration Guide

This guide maps the older $... forms to the current syntax.

Core Mapping

Legacy	Current
$script({ is_price_study: true })	`script({ type: 'indicator'
$symbols([...])	symbols([...])
$input({ name, type, defval })	input.integer(...), input.float(...), or input.bool(...)
$symbol.close[index].get(offset)	symbol.close[index].get(offset)
$talib.*	ta.*

What To Change First

1. replace legacy input declarations with input.*
2. replace basket declarations with symbols([...])
3. rename $symbol access to symbol
4. keep strategy.entry({ ... }) and strategy.exit({ ... }) in object form

Example Migration

Legacy style:

$script({ is_price_study: true });
$symbols(['BTCUSDT:BINANCE:FUTURE:DEFAULT']);
let length = $input({ name: 'Length', type: 'integer', defval: 14 });
let closeValue = $symbol.close[0].get(0);

Current style:

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

symbols(['BTCUSDT:BINANCE:FUTURE:DEFAULT']);
const length = input.integer('Length', 14);
const closeValue = symbol.close[0].get(0);

Migration Rules

• keep the symbol order stable
• keep the trade ids stable
• do not mix old and new input forms in the same script
• re-test the script after each conversion step