This indicator marks the resistances and supports of the post, pre and market sessions of the previous day projecting up to the market of the day, also it marks the hours of these three markets allowing to identify the beginning and end of the sessions in London, Hong Kong, and America.
Open-source script
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.
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