This script is about rainbow color gradient, there are 35 colors from red to purple. The color changes with the time series, from light to dark, and then to light, repeat. Maybe it's visually beautiful. Compared to practicality, I prefer to use it as a color gradient reference. for the later works.
The changing process of the rainbow (resolution = 63).
彩虹帶的時序變化過程，分辨度是63格，充滿 (✪ω✪) 圖表藝術！
In true TradingView spirit, the author of this script has published it open-source, so traders can understand and verify it. Cheers to the author! You may use it for free, but reuse of this code in a publication is governed by House Rules. You can favorite it to use it on a chart.