pine-debugger

name	pine-debugger
description	Debugs Pine Script v6 compile errors, runtime logic mistakes, repainting, and order/fill misunderstandings. Use when the user pastes an error, wrong signals, or unexpected backtest behavior.
metadata	{"version":"1.0","domain":"pine-script"}

Pine debugger

Steps

1. Compile-level: undefined identifiers, bad arity, type mismatch, misplaced if/for.
2. Series logic: accidental use of future data; var vs reassignment; off-by-one on [].
3. Repaint: request.security lookahead; unconfirmed realtime bar; calc_on_every_tick.
4. Strategy: order timing (process_orders_on_close, calc_on_order_fills); conflicting strategy.exit ids; position size.

Techniques

• Temporarily plotchar or label.new conditions to compare intended vs actual triggers.
• Reduce to a minimal script that still reproduces the issue.

Output

• Fixed full script when possible.
• Short explanation: root cause and what changed.