15M Swing Sweep Lines + SMT (ES vs NQ)

15M Swing Sweep Lines (NY Killzones)Visualize liquidity sweeps of 15-minute swing highs/lows exclusively during high-impact London & New York killzones.This ICT-inspired indicator detects when price sweeps (wicks beyond) the most recent confirmed 15-minute swing high or low — classic signs of liquidity raids or stop hunts — but only if the sweep happens during key "killzone" sessions where institutional activity is typically highest.Key Features15M Swing Detection: Uses confirmed pivot highs/lows (length 2) on the 15-minute timeframe for reliable structure points.
Killzone Filters (New York time):London Killzone: 3:00 AM – 4:59 AM
New York Killzone: 9:30 AM – 10:59 AM (captures the high-volatility NY open overlap)

Sweep Visualization:Bearish Sweep (high > last 15M swing high): Thick red horizontal line from the swing point to the sweep bar.
Bullish Sweep (low < last 15M swing low): Thick green horizontal line from the swing point to the sweep bar.

Lines use xloc.bar_time for precise placement and extend only to the bar where the sweep occurs.
No duplicates: Prevents multiple lines for the same swing sweep.
Non-repainting logic with lookahead_off for clean, trustworthy signals.

Why Killzones MatterMany ICT/SMC traders focus on these windows because they often feature aggressive manipulation, equal highs/lows sweeps, and the setup for strong directional moves. This tool helps you instantly spot when buy-side or sell-side liquidity has been raided on the 15M structure during these prime times.Ideal ForConfirming potential reversals or inducements after liquidity grabs.
Adding confluence to entries during London or NY sessions.
Futures traders (ES, NQ, etc.) looking for clean visual cues of smart money engineering.

Lightweight, overlay-friendly, and focused — add it to your chart for clearer insight into 15M liquidity sweeps when it matters most. Perfect companion for killzone-based strategies!