Version 1.6 2024.07.12
//v1.6, 13/jul/2024
// - use chart sym if input empty
// - scale/draw on same sym tf
Version 1.5 2024.02.28
//v1.5 28/feb/2024
// - added option to show ask and bid lines
Version 1.4 2024.01.29
//v1.4
// - option to invert overlay
// - text updated to say if inverted
// - option to shrink overlay to bottom of chart
Version 1.3 2023.12.16
//v1.3
// - removed excessive printout on every tick when a new candle time for current/source don't align
Version 1.2 2023.12.16
//v1.2
// - extra ohlc buffers for overlay symbol in data window
// - extra error printouts
Version 1.1 2023.12.16
//v1.1
// - timer update if data from other sym/tf not ready