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...
-Shows the gap between 4pm close and 9:30am open; the Regular trading hours Vs Electronic trading hours Gap (RTH vs ETH).
-Displays this as a box starting at 9:30am, whose bottom is the 9:30am open; top is previous day's 4pm close.
-Displays when chart is toggled to either of ETH or RTH.
-Useful reminder of area above/below opening bell price that price often has...
