PF OCA Probe 02 Multi-Bracket Isolation

// This Pine Script® code is licensed under Apache-2.0
// SPDX-License-Identifier: Apache-2.0
// © PineForge contributors 2026
//
// OCA probe 02 — multi-bracket via strategy.exit (internal CANCEL)
//
// Purpose: two strategy.exit brackets attached to same long entry,
// different ATR widths + different oca_name. Tests cross-bracket
// isolation: tight bracket fills first → only its own TP/SL cancel,
// the wider bracket continues running. Pine v6 strategy.exit uses
// internal OCA-CANCEL between TP and SL within the SAME oca_name.
// Different oca_name → independent.
//
// strategy.exit is close-only → no leaked-short trap.
//
// Trade shape: long-only RSI/EMA confluence, qty=2 entry, two brackets
// each qty=1.
//
// TV setup: 15m chart, ETH-USDT-USDT.
//@version=6
strategy("PF OCA probe 02 - multi-bracket isolation", shorttitle="OCA_p02_MGP", overlay=true,
     initial_capital=1000000,
     commission_type=strategy.commission.percent, commission_value=0, slippage=0,
     default_qty_type=strategy.fixed, default_qty_value=2, pyramiding=1,
     process_orders_on_close=false)

rsiVal  = ta.rsi(close, 14)
atrVal  = ta.atr(14)
emaFast = ta.ema(close, 9)
emaSlow = ta.ema(close, 21)

bool entryCond = ta.crossover(emaFast, emaSlow) and rsiVal < 60

if entryCond and strategy.position_size == 0
    strategy.entry("L", strategy.long, qty=2, comment="entry")

if strategy.position_size > 0
    entry = strategy.position_avg_price
    // Bracket A: tight ATR — hits more often
    strategy.exit("X_A", from_entry="L", qty=1,
         limit=entry + atrVal * 1.0, stop=entry - atrVal * 1.0,
         oca_name="GRP_A")
    // Bracket B: wider ATR — independent group
    strategy.exit("X_B", from_entry="L", qty=1,
         limit=entry + atrVal * 2.0, stop=entry - atrVal * 2.0,
         oca_name="GRP_B")