Keep the test with the idea.

strategy OpeningRangeBreakout "Stop-entry breakout of the first N minutes of the regular session, fixed bracket, one trade per session"

param or_bars: int = 15 in 5..60 step 5 "Opening range length (bars)"
param stop_ticks: int = 40 in 8..200 step 8 "Stop loss (ticks)"
param target_ticks: int = 80 in 8..400 step 8 "Profit target (ticks)"

settings {
  exit_on_session_close = true
  entries_per_direction = 1
}

var or_high: float = 0
var or_low: float = 0
var done: bool = false

risk {
  stop_loss ticks stop_ticks
  profit_target ticks target_ticks
}

on bar {
  if session.first_bar {
    or_high = high
    or_low = low
    done = false
  } else if session.bar_index < or_bars {
    or_high = max(or_high, high)
    or_low = min(or_low, low)
  }
  if position.size != 0 {
    done = true
  }
  if session.bar_index >= or_bars and position.size == 0 and not done {
    if close > (or_high + or_low) / 2 {
      enter long at stop or_high + tick_size name "OrbLong"
    } else {
      enter short at stop or_low - tick_size name "OrbShort"
    }
  }
}