Pre-market Highs & Lows on regular trading hours (RTH) chart

Shows pre-market highs and lows on RTH or ETH chart

-Pre-market duration user input (default is 16 'bar hours'; covering the time from S&P RTH close at 4pm >> 9:30am RTH open next day
-Displays on both RTH and ETH charts
-Written for ES (ES1! or e.g ESM2023), but tested and working on SPY, SPX
-Works across timeframes


Example usage on Electronic trading hours (ETH) chart; showing the 'bar hours' user input lookback duration visually

Notes de version:

-Added realtime plotting of out-of-hours highest/lowest as price progresses through the overnight session. Lines move on 'static' RTH chart too. This will dissappear and be replaced with the original lines as we enter the opening bell.
-Really this indicator is designed / working properly only on ES, NQ, YM (i.e. ES1!, ESM2023 etc etc). Not printing correctly on SPY due to extended session time quirks.
-I'm planning to release a much simpler realtime version, current day only, versatile across all all variants of S&P 500.

Notes de version:

-fixed code: needed to use request.security_lower_tf() to fetch price data from ETH feed while on RTH chart during extended hours (request.security() would not work)

Notes de version:

-Note on the above update: due to pinescript execution model (execute on a new bar), when viewing on RTH static chart overnight, only way to retrieve ETH up-to-date levels is to refresh the page.