gary Long Vertical Spread with Trend Filter

// Description (begin with English; allowed to include additional languages after):
// English:
// "gary Long Vertical Spread with Trend Filter" — protected release by GaryQuant.
// This indicator generates long-entry related signals (B3, B2) and exit/other signals (S, J)
// based on RSI, simple moving averages and a daily ATR-derived optimal price. A trend filter
// (configurable multi-timeframe) optionally suppresses certain long-entry signals in bearish
// conditions. The script supports a "B filter" to limit B signals frequency, draws persistent
// boxes/labels on confirmed bars, and provides alertconditions for filtered confirmed signals.
//
// Key defaults and usage:
// - Pine version: v5 (script published as Protected).
// - Trend filter default timeframe: 15 minutes (configurable).
// - Daily ATR length default: 14 (used to compute optimal price).
// - Recommended use: short timeframes where 1-minute signals are evaluated, trend filter TF
// may be set to 15m/30m/1h/etc. Adjust inputs to match your instrument and timeframe.
// - Inputs are exposed via the indicator settings (periods, multipliers, B filter minutes, etc.).
// - This publication is Protected; source code is not publicly exposed. The description provides
// sufficient explanation for moderation and user understanding without disclosing proprietary logic.